TY  - JOUR
AU  - Šokarda Slavić, Marinela
AU  - Margetić, Aleksandra
AU  - Dojnov, Biljana
AU  - Vujčić, Miroslava
AU  - Mišić, Milan
AU  - Božić, Nataša
AU  - Vujčić, Zoran
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5787
AB  - Bioethanol is one of the main bio-based molecules produced mainly from sugar cane, molasses and corn. Its environmental advantages allow it to be considered as safe and the cleanest fuel alternative. Starch is a widespread renewable carbohydrate conventionally used for bioethanol production via energy demanding liquefaction and saccharification processes. Raw starch hydrolysis using enzymes capable of degrading it below the gelatinization temperature significantly simplifies the process and reduces the cost of starch processing. In this study, an innovative modified simultaneous saccharification and fermentation process is proposed for the production of bioethanol from highly concentrated raw corn starch (30 % w/v). A two-step synergistic hydrolysis and fermentation was carried out in a single bioreactor vessel. To ensure high process efficiency, factors influencing the hydrolysis of concentrated raw corn starch by raw starch degrading α-amylase from Bacillus paralicheniformis ATCC 9945a (BliAmy) and commercial glucoamylase were investigated. Box–Behnken experimental design was used to predict the effects of different ratios of added enzymes, glucoamylase addition time, incubation time, and pH on hydrolysis yield. Optimal conditions for the highest yield of hydrolysis of raw corn starch (90 %) were obtained after 8 h using 5.0 IU BliAmy per mg of starch and 0.5 % (v/v) glucoamylase at pH 4.5 and 60 °C. Obtained glucose was further fermented with Saccharomyces cerevisiae at 30 °C in the same vessel for bioethanol production. Bioethanol concentration at 129.2 g/L, with productivity of 2.94 g/L/h and ethanol yield (YP/S) at 0.50 g EtOH/g total sugar, equivalent to 87.8 % theoretical yield, was obtained by modified simultaneous saccharification and fermentation. This work enriches the information of bioethanol production and offers a novel strategy for raw starch hydrolysis under industrial conditions.
PB  - Elsevier Ltd
T2  - Fuel
T1  - Modified simultaneous saccharification and fermentation for the production of bioethanol from highly concentrated raw corn starch
VL  - 338
SP  - 127363
DO  - 10.1016/j.fuel.2022.127363
ER  - 

@article{
author = "Šokarda Slavić, Marinela and Margetić, Aleksandra and Dojnov, Biljana and Vujčić, Miroslava and Mišić, Milan and Božić, Nataša and Vujčić, Zoran",
year = "2023",
abstract = "Bioethanol is one of the main bio-based molecules produced mainly from sugar cane, molasses and corn. Its environmental advantages allow it to be considered as safe and the cleanest fuel alternative. Starch is a widespread renewable carbohydrate conventionally used for bioethanol production via energy demanding liquefaction and saccharification processes. Raw starch hydrolysis using enzymes capable of degrading it below the gelatinization temperature significantly simplifies the process and reduces the cost of starch processing. In this study, an innovative modified simultaneous saccharification and fermentation process is proposed for the production of bioethanol from highly concentrated raw corn starch (30 % w/v). A two-step synergistic hydrolysis and fermentation was carried out in a single bioreactor vessel. To ensure high process efficiency, factors influencing the hydrolysis of concentrated raw corn starch by raw starch degrading α-amylase from Bacillus paralicheniformis ATCC 9945a (BliAmy) and commercial glucoamylase were investigated. Box–Behnken experimental design was used to predict the effects of different ratios of added enzymes, glucoamylase addition time, incubation time, and pH on hydrolysis yield. Optimal conditions for the highest yield of hydrolysis of raw corn starch (90 %) were obtained after 8 h using 5.0 IU BliAmy per mg of starch and 0.5 % (v/v) glucoamylase at pH 4.5 and 60 °C. Obtained glucose was further fermented with Saccharomyces cerevisiae at 30 °C in the same vessel for bioethanol production. Bioethanol concentration at 129.2 g/L, with productivity of 2.94 g/L/h and ethanol yield (YP/S) at 0.50 g EtOH/g total sugar, equivalent to 87.8 % theoretical yield, was obtained by modified simultaneous saccharification and fermentation. This work enriches the information of bioethanol production and offers a novel strategy for raw starch hydrolysis under industrial conditions.",
publisher = "Elsevier Ltd",
journal = "Fuel",
title = "Modified simultaneous saccharification and fermentation for the production of bioethanol from highly concentrated raw corn starch",
volume = "338",
pages = "127363",
doi = "10.1016/j.fuel.2022.127363"
}

Šokarda Slavić, M., Margetić, A., Dojnov, B., Vujčić, M., Mišić, M., Božić, N.,& Vujčić, Z.. (2023). Modified simultaneous saccharification and fermentation for the production of bioethanol from highly concentrated raw corn starch. in Fuel
Elsevier Ltd., 338, 127363.
https://doi.org/10.1016/j.fuel.2022.127363

Šokarda Slavić M, Margetić A, Dojnov B, Vujčić M, Mišić M, Božić N, Vujčić Z. Modified simultaneous saccharification and fermentation for the production of bioethanol from highly concentrated raw corn starch. in Fuel. 2023;338:127363.
doi:10.1016/j.fuel.2022.127363 .

Šokarda Slavić, Marinela, Margetić, Aleksandra, Dojnov, Biljana, Vujčić, Miroslava, Mišić, Milan, Božić, Nataša, Vujčić, Zoran, "Modified simultaneous saccharification and fermentation for the production of bioethanol from highly concentrated raw corn starch" in Fuel, 338 (2023):127363,
https://doi.org/10.1016/j.fuel.2022.127363 . .

TY  - CONF
AU  - Ristović, Marina
AU  - Stojanović, Sanja
AU  - Šokarda Slavić, Marinela
AU  - Margetić, Aleksandra
AU  - Božić, Nataša
AU  - Vujčić, Zoran
AU  - Dojnov, Biljana
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6029
AB  - Since each region of the world has different agricultural sectors, specific residues are generating and at the same time a wide range of alternative novel sources of nutrients emerge, such as carbohydrates, proteins and minerals. Usage of biomass residues as start material for prebiotics production is preferable from the standpoint of ecology and as cheap production process. Corn cob can be considered as the main source for xylooligosaccharides (XOS) production. XOS are prebiotic, functional food ingredients, with biological benefits such as immunomodulatory and anti-inflammatory properties, anticancer and antioxidant activity. The European Commission has approved XOS produced from corn cob as a safe for human consumption. The corn cob mainly consists of lignocellulose. Chemical treatment is used to extract the hemicelullose from corn cob which is then hydrolyzed to XOS by fungal xylanases. Xylanase produced by fungi genera Aspergillus and Trichoderma are considered key enzymes for XOS production. Fermentation enzyme extract of strain Aspergillus tubingensis FAT35, obtained after SSF on corn cob as substrate, was used for hydrolysis of corn cob xylan to XOS. A. tubigensis FAT35 produced high level of xylanase (350 U/mL). Obtained XOS (2-10 units) were characterized by TLC and by antioxidant activity (ORAC, DPPH, FRAP, and ABTS). Significant antioxidant potential was shown by all used antioxidant tests. The obtained XOS are suitable to be a functional food additive and are obtained from agro-waste material by environmentally and economically suitable way.
PB  - European Federation of Biotechnology
C3  - Programme and abstract book - Biotechnology for a circular bioeconomy: carbon capture, waste recycling and mitigation of global warming, 28-29 March 2023, online
T1  - Corn cob agro-waste as valuable material for XOS production by fungal enzymes
SP  - 67
EP  - 67
UR  - https://hdl.handle.net/21.15107/rcub_cer_6029
ER  - 

@conference{
author = "Ristović, Marina and Stojanović, Sanja and Šokarda Slavić, Marinela and Margetić, Aleksandra and Božić, Nataša and Vujčić, Zoran and Dojnov, Biljana",
year = "2023",
abstract = "Since each region of the world has different agricultural sectors, specific residues are generating and at the same time a wide range of alternative novel sources of nutrients emerge, such as carbohydrates, proteins and minerals. Usage of biomass residues as start material for prebiotics production is preferable from the standpoint of ecology and as cheap production process. Corn cob can be considered as the main source for xylooligosaccharides (XOS) production. XOS are prebiotic, functional food ingredients, with biological benefits such as immunomodulatory and anti-inflammatory properties, anticancer and antioxidant activity. The European Commission has approved XOS produced from corn cob as a safe for human consumption. The corn cob mainly consists of lignocellulose. Chemical treatment is used to extract the hemicelullose from corn cob which is then hydrolyzed to XOS by fungal xylanases. Xylanase produced by fungi genera Aspergillus and Trichoderma are considered key enzymes for XOS production. Fermentation enzyme extract of strain Aspergillus tubingensis FAT35, obtained after SSF on corn cob as substrate, was used for hydrolysis of corn cob xylan to XOS. A. tubigensis FAT35 produced high level of xylanase (350 U/mL). Obtained XOS (2-10 units) were characterized by TLC and by antioxidant activity (ORAC, DPPH, FRAP, and ABTS). Significant antioxidant potential was shown by all used antioxidant tests. The obtained XOS are suitable to be a functional food additive and are obtained from agro-waste material by environmentally and economically suitable way.",
publisher = "European Federation of Biotechnology",
journal = "Programme and abstract book - Biotechnology for a circular bioeconomy: carbon capture, waste recycling and mitigation of global warming, 28-29 March 2023, online",
title = "Corn cob agro-waste as valuable material for XOS production by fungal enzymes",
pages = "67-67",
url = "https://hdl.handle.net/21.15107/rcub_cer_6029"
}

Ristović, M., Stojanović, S., Šokarda Slavić, M., Margetić, A., Božić, N., Vujčić, Z.,& Dojnov, B.. (2023). Corn cob agro-waste as valuable material for XOS production by fungal enzymes. in Programme and abstract book - Biotechnology for a circular bioeconomy: carbon capture, waste recycling and mitigation of global warming, 28-29 March 2023, online
European Federation of Biotechnology., 67-67.
https://hdl.handle.net/21.15107/rcub_cer_6029

Ristović M, Stojanović S, Šokarda Slavić M, Margetić A, Božić N, Vujčić Z, Dojnov B. Corn cob agro-waste as valuable material for XOS production by fungal enzymes. in Programme and abstract book - Biotechnology for a circular bioeconomy: carbon capture, waste recycling and mitigation of global warming, 28-29 March 2023, online. 2023;:67-67.
https://hdl.handle.net/21.15107/rcub_cer_6029 .

Ristović, Marina, Stojanović, Sanja, Šokarda Slavić, Marinela, Margetić, Aleksandra, Božić, Nataša, Vujčić, Zoran, Dojnov, Biljana, "Corn cob agro-waste as valuable material for XOS production by fungal enzymes" in Programme and abstract book - Biotechnology for a circular bioeconomy: carbon capture, waste recycling and mitigation of global warming, 28-29 March 2023, online (2023):67-67,
https://hdl.handle.net/21.15107/rcub_cer_6029 .

TY  - CONF
AU  - Stojanović, Sanja
AU  - Margetić, Aleksandra
AU  - Šokarda Slavić, Marinela
AU  - Božić, Nataša
AU  - Vujčić, Zoran
AU  - Dojnov, Biljana
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6242
AB  - Most of the functional oligosaccharides (OS) consist of monomers, present in varying degrees of polymerization (DP) ranging between 3 and 10 units. DP of inulin-type fructooligosaccharides has a great impact on fermentability and their
utilization by probiotic bacteria such is Bifidobacteria, thus they have a great impact on their health-promoting effect. Technological properties of fructooligosaccharides (FOS) can improve the physicochemical and sensory characteristics of food products, leading to their increased application in the food industry. It has been found that microbial endoinulinase plays an important role in production of inulin-type fructooligosaccharides. Aspergillus welwitschiae FAW1 strain has proven to be non-toxigenic with the absence of biosynthetic gene clusters for mycotoxins (ochratoxins and fumonisins) and therefore safe for use in food production [5]. Growing on the natural substrate, triticale (Triticosecale sp) FAW1 strain produced inulinase complex from which endoinulinase (InuA) was purified by chromatographic techniques. FOS was prepared by time-controlled hydrolysis of inulin. Monitoring kinetics and determining the amount of obtained FOS by TLC and HPLC methods led to a conclusion that FOS production by hydrolysis of inulin is kinetic dependent reaction. Depending on the reaction time, FOS with different compositions are obtained.The largest amount of produced FOS (DP 2-6) has been in 15-20 minutes of the reaction, where the resulting mixture contains small amount of mono- and disaccharides. The obtained FOS were characterized on antioxidant capacity. Produced FOS showed significant antioxidant potential according to ORAC method which classifies them as potent candidate as additives in functional food. Endoinulinase (InuA) form A. welvitscihae FAW1 considered as key enzyme in FOS preparation. The composition and lenght of the produced FOS can be varied by controlling the reaction time, depending on the needs of of the market and their eventual application.
PB  - Serbian Chemical Society
C3  - Abstract Book - XXII Congress EuroFoodChem, June 14-16, 2023, Belgrade, Serbia
T1  - Obtaining of FOS by controlled hydrolysis of inulin with Aspergillus welwitschiae FAW1 endoinulinase
SP  - 203
EP  - 203
UR  - https://hdl.handle.net/21.15107/rcub_cer_6242
ER  - 

@conference{
author = "Stojanović, Sanja and Margetić, Aleksandra and Šokarda Slavić, Marinela and Božić, Nataša and Vujčić, Zoran and Dojnov, Biljana",
year = "2023",
abstract = "Most of the functional oligosaccharides (OS) consist of monomers, present in varying degrees of polymerization (DP) ranging between 3 and 10 units. DP of inulin-type fructooligosaccharides has a great impact on fermentability and their
utilization by probiotic bacteria such is Bifidobacteria, thus they have a great impact on their health-promoting effect. Technological properties of fructooligosaccharides (FOS) can improve the physicochemical and sensory characteristics of food products, leading to their increased application in the food industry. It has been found that microbial endoinulinase plays an important role in production of inulin-type fructooligosaccharides. Aspergillus welwitschiae FAW1 strain has proven to be non-toxigenic with the absence of biosynthetic gene clusters for mycotoxins (ochratoxins and fumonisins) and therefore safe for use in food production [5]. Growing on the natural substrate, triticale (Triticosecale sp) FAW1 strain produced inulinase complex from which endoinulinase (InuA) was purified by chromatographic techniques. FOS was prepared by time-controlled hydrolysis of inulin. Monitoring kinetics and determining the amount of obtained FOS by TLC and HPLC methods led to a conclusion that FOS production by hydrolysis of inulin is kinetic dependent reaction. Depending on the reaction time, FOS with different compositions are obtained.The largest amount of produced FOS (DP 2-6) has been in 15-20 minutes of the reaction, where the resulting mixture contains small amount of mono- and disaccharides. The obtained FOS were characterized on antioxidant capacity. Produced FOS showed significant antioxidant potential according to ORAC method which classifies them as potent candidate as additives in functional food. Endoinulinase (InuA) form A. welvitscihae FAW1 considered as key enzyme in FOS preparation. The composition and lenght of the produced FOS can be varied by controlling the reaction time, depending on the needs of of the market and their eventual application.",
publisher = "Serbian Chemical Society",
journal = "Abstract Book - XXII Congress EuroFoodChem, June 14-16, 2023, Belgrade, Serbia",
title = "Obtaining of FOS by controlled hydrolysis of inulin with Aspergillus welwitschiae FAW1 endoinulinase",
pages = "203-203",
url = "https://hdl.handle.net/21.15107/rcub_cer_6242"
}

Stojanović, S., Margetić, A., Šokarda Slavić, M., Božić, N., Vujčić, Z.,& Dojnov, B.. (2023). Obtaining of FOS by controlled hydrolysis of inulin with Aspergillus welwitschiae FAW1 endoinulinase. in Abstract Book - XXII Congress EuroFoodChem, June 14-16, 2023, Belgrade, Serbia
Serbian Chemical Society., 203-203.
https://hdl.handle.net/21.15107/rcub_cer_6242

Stojanović S, Margetić A, Šokarda Slavić M, Božić N, Vujčić Z, Dojnov B. Obtaining of FOS by controlled hydrolysis of inulin with Aspergillus welwitschiae FAW1 endoinulinase. in Abstract Book - XXII Congress EuroFoodChem, June 14-16, 2023, Belgrade, Serbia. 2023;:203-203.
https://hdl.handle.net/21.15107/rcub_cer_6242 .

Stojanović, Sanja, Margetić, Aleksandra, Šokarda Slavić, Marinela, Božić, Nataša, Vujčić, Zoran, Dojnov, Biljana, "Obtaining of FOS by controlled hydrolysis of inulin with Aspergillus welwitschiae FAW1 endoinulinase" in Abstract Book - XXII Congress EuroFoodChem, June 14-16, 2023, Belgrade, Serbia (2023):203-203,
https://hdl.handle.net/21.15107/rcub_cer_6242 .

TY  - JOUR
AU  - Šokarda Slavić, Marinela
AU  - Kojić, Milan
AU  - Margetić, Aleksandra
AU  - Stanisavljević, Nemanja
AU  - Gardijan, Lazar
AU  - Božić, Nataša
AU  - Vujčić, Zoran
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6458
AB  - α-Amylase from the thermophilic bacterial strain Anoxybacillus vranjensis ST4 (AVA) was cloned into the pMALc5HisEk expression vector and successfully expressed and purified from the Escherichia coli ER2523 host strain. AVA belongs to the GH13_5 subfamily of glycoside hydrolases and has 7 conserved sequence regions (CSRs) distributed in three distinct domains (A, B, C). In addition, there is a starch binding domain (SBD) from the CBM20 family of carbohydrate binding modules (CBMs). AVA is a monomer of 66 kDa that achieves maximum activity at 60–80 °C and is active and stable over a wide pH range (4.0–9.0). AVA retained 50 % of its activity after 31 h of incubation at 60 °C and was resistant to a large number of denaturing agents. It hydrolyzed starch granules very efficiently, releasing maltose, maltotriose and maltopentaose as the main products. The hydrolysis rates of raw corn, wheat, horseradish, and potato starch, at a concentration of 10 %, were 87.8, 85.9, 93.0, and 58 %, respectively, at pH 8.5 over a 3 h period. This study showed that the high level of expression as well as the properties of this highly stable and versatile enzyme show all the prerequisites for successful application in industry.
PB  - Elsevier
T2  - International Journal of Biological Macromolecules
T1  - Highly stable and versatile α-amylase from Anoxybacillus vranjensis ST4 suitable for various applications
VL  - 249
SP  - 126055
DO  - 10.1016/j.ijbiomac.2023.126055
ER  - 

@article{
author = "Šokarda Slavić, Marinela and Kojić, Milan and Margetić, Aleksandra and Stanisavljević, Nemanja and Gardijan, Lazar and Božić, Nataša and Vujčić, Zoran",
year = "2023",
abstract = "α-Amylase from the thermophilic bacterial strain Anoxybacillus vranjensis ST4 (AVA) was cloned into the pMALc5HisEk expression vector and successfully expressed and purified from the Escherichia coli ER2523 host strain. AVA belongs to the GH13_5 subfamily of glycoside hydrolases and has 7 conserved sequence regions (CSRs) distributed in three distinct domains (A, B, C). In addition, there is a starch binding domain (SBD) from the CBM20 family of carbohydrate binding modules (CBMs). AVA is a monomer of 66 kDa that achieves maximum activity at 60–80 °C and is active and stable over a wide pH range (4.0–9.0). AVA retained 50 % of its activity after 31 h of incubation at 60 °C and was resistant to a large number of denaturing agents. It hydrolyzed starch granules very efficiently, releasing maltose, maltotriose and maltopentaose as the main products. The hydrolysis rates of raw corn, wheat, horseradish, and potato starch, at a concentration of 10 %, were 87.8, 85.9, 93.0, and 58 %, respectively, at pH 8.5 over a 3 h period. This study showed that the high level of expression as well as the properties of this highly stable and versatile enzyme show all the prerequisites for successful application in industry.",
publisher = "Elsevier",
journal = "International Journal of Biological Macromolecules",
title = "Highly stable and versatile α-amylase from Anoxybacillus vranjensis ST4 suitable for various applications",
volume = "249",
pages = "126055",
doi = "10.1016/j.ijbiomac.2023.126055"
}

Šokarda Slavić, M., Kojić, M., Margetić, A., Stanisavljević, N., Gardijan, L., Božić, N.,& Vujčić, Z.. (2023). Highly stable and versatile α-amylase from Anoxybacillus vranjensis ST4 suitable for various applications. in International Journal of Biological Macromolecules
Elsevier., 249, 126055.
https://doi.org/10.1016/j.ijbiomac.2023.126055

Šokarda Slavić M, Kojić M, Margetić A, Stanisavljević N, Gardijan L, Božić N, Vujčić Z. Highly stable and versatile α-amylase from Anoxybacillus vranjensis ST4 suitable for various applications. in International Journal of Biological Macromolecules. 2023;249:126055.
doi:10.1016/j.ijbiomac.2023.126055 .

Šokarda Slavić, Marinela, Kojić, Milan, Margetić, Aleksandra, Stanisavljević, Nemanja, Gardijan, Lazar, Božić, Nataša, Vujčić, Zoran, "Highly stable and versatile α-amylase from Anoxybacillus vranjensis ST4 suitable for various applications" in International Journal of Biological Macromolecules, 249 (2023):126055,
https://doi.org/10.1016/j.ijbiomac.2023.126055 . .

TY  - CONF
AU  - Ristović, Marina
AU  - Margetić, Aleksandra
AU  - Stojanović, Sanja
AU  - Šokarda Slavić, Marinela
AU  - Božić, Nataša
AU  - Vujčić, Zoran
AU  - Dojnov, Biljana
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7135
AB  - Corn is widely used in the diet all over the world which generate corn cob as one of the most common agrowaste material. Corn cob mainly consists of lignocellulose with a high quantity of xylan; therefore, it can be considered the main source for xylooligosaccharides (XOS) production. XOS are prebiotic, functional food ingredients, which stand out on the market of oligosaccharide prebiotics because of their properties (antitumor effect, immunomodulatory effect, antioxidant power, and high pH and thermal stability). The European Commission has approved XOS produced from corn cob as safe for human consumption. For XOS production highly efficient xylanase obtained by Aspergillus tubingensis FAT35 under SSF on corn cob medium was used. Three methods of XOS production were evaluated: by hydrolysis of xylan alkali isolated from corn cob, by direct hydrolysis of xylan in corn cob and simultaneously production during fungal growth on corn cob (in situ). XOS were separated by ethanol precipitation from corn cob hydrolysate and from fermentation extract. In this way, the enzyme is concentrated in the precipitate, and XOS (remaining in the supernatant) are partially purified (separated from unhydrolyzed xylan and long chain oligomers). All prepared XOS were characterized by TLC and HPLC and antioxidant potential. Thanks to the high antioxidant potential (proven by DPPH, ABTS, FRAP, and ORAC tests) obtained XOS are good candidates for a functional food additive. Although the highest yield of XOS was obtained by the standard method (enzymatic hydrolysis of isolated xylan), additional methods represent the direct use of agro-waste material in an environmentally and economically suitable way. Special attention attracts in situ production because after isolation of XOS by ethanol precipitation the enzyme remains functional active and available for further use in next process.
PB  - Elsevier
C3  - Book of Abstracts - 3rd Food Chemistry Conference, 10-12 October 2023, Dresden, Germany
T1  - The use of corn cob as an excellent starting material for obtaining XOS and fungal enzymes involved in their production
SP  - P2.002
UR  - https://hdl.handle.net/21.15107/rcub_cer_7135
ER  - 

@conference{
author = "Ristović, Marina and Margetić, Aleksandra and Stojanović, Sanja and Šokarda Slavić, Marinela and Božić, Nataša and Vujčić, Zoran and Dojnov, Biljana",
year = "2023",
abstract = "Corn is widely used in the diet all over the world which generate corn cob as one of the most common agrowaste material. Corn cob mainly consists of lignocellulose with a high quantity of xylan; therefore, it can be considered the main source for xylooligosaccharides (XOS) production. XOS are prebiotic, functional food ingredients, which stand out on the market of oligosaccharide prebiotics because of their properties (antitumor effect, immunomodulatory effect, antioxidant power, and high pH and thermal stability). The European Commission has approved XOS produced from corn cob as safe for human consumption. For XOS production highly efficient xylanase obtained by Aspergillus tubingensis FAT35 under SSF on corn cob medium was used. Three methods of XOS production were evaluated: by hydrolysis of xylan alkali isolated from corn cob, by direct hydrolysis of xylan in corn cob and simultaneously production during fungal growth on corn cob (in situ). XOS were separated by ethanol precipitation from corn cob hydrolysate and from fermentation extract. In this way, the enzyme is concentrated in the precipitate, and XOS (remaining in the supernatant) are partially purified (separated from unhydrolyzed xylan and long chain oligomers). All prepared XOS were characterized by TLC and HPLC and antioxidant potential. Thanks to the high antioxidant potential (proven by DPPH, ABTS, FRAP, and ORAC tests) obtained XOS are good candidates for a functional food additive. Although the highest yield of XOS was obtained by the standard method (enzymatic hydrolysis of isolated xylan), additional methods represent the direct use of agro-waste material in an environmentally and economically suitable way. Special attention attracts in situ production because after isolation of XOS by ethanol precipitation the enzyme remains functional active and available for further use in next process.",
publisher = "Elsevier",
journal = "Book of Abstracts - 3rd Food Chemistry Conference, 10-12 October 2023, Dresden, Germany",
title = "The use of corn cob as an excellent starting material for obtaining XOS and fungal enzymes involved in their production",
pages = "P2.002",
url = "https://hdl.handle.net/21.15107/rcub_cer_7135"
}

Ristović, M., Margetić, A., Stojanović, S., Šokarda Slavić, M., Božić, N., Vujčić, Z.,& Dojnov, B.. (2023). The use of corn cob as an excellent starting material for obtaining XOS and fungal enzymes involved in their production. in Book of Abstracts - 3rd Food Chemistry Conference, 10-12 October 2023, Dresden, Germany
Elsevier., P2.002.
https://hdl.handle.net/21.15107/rcub_cer_7135

Ristović M, Margetić A, Stojanović S, Šokarda Slavić M, Božić N, Vujčić Z, Dojnov B. The use of corn cob as an excellent starting material for obtaining XOS and fungal enzymes involved in their production. in Book of Abstracts - 3rd Food Chemistry Conference, 10-12 October 2023, Dresden, Germany. 2023;:P2.002.
https://hdl.handle.net/21.15107/rcub_cer_7135 .

Ristović, Marina, Margetić, Aleksandra, Stojanović, Sanja, Šokarda Slavić, Marinela, Božić, Nataša, Vujčić, Zoran, Dojnov, Biljana, "The use of corn cob as an excellent starting material for obtaining XOS and fungal enzymes involved in their production" in Book of Abstracts - 3rd Food Chemistry Conference, 10-12 October 2023, Dresden, Germany (2023):P2.002,
https://hdl.handle.net/21.15107/rcub_cer_7135 .

TY  - CONF
AU  - Šokarda Slavić, Marinela
AU  - Margetić, Aleksandra
AU  - Dojnov, Biljana
AU  - Vujčić, Miroslava
AU  - Ristović, Marina
AU  - Božić, Nataša
AU  - Vujčić, Zoran
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7137
AB  - Given the growing concern about the depletion of fossil fuels, global warming, and the loss of natural resources, bioethanol made from sugar cane, molasses, and corn continues to garner interest globally and is regarded as the safest and cleanest alternative to oil. Starch is a widely available renewable carbohydrate from which bioethanol is conventionally obtained through energy demanding liquefaction and saccharification processes. A significant simplification of the process and a reduction of starch processing costs would be possible by applying raw starch hydrolysis using enzymes capable of degrading starch below the gelatinization temperature. A novel strategy for highly concentrated raw corn starch (30 % w/v) hydrolysis based on a modified simultaneous saccharification and fermentation process is optimized for the production of bioethanol. Different ratios of Bacillus paralicheniformis ATCC 9945a (BliAmy) and glucoamylase (Dextrozyme® GA), glucoamylase addition time, incubation time, and pH were investigated using a Box–Behnken experimental design to ensure high process efficiency. A two-step synergistic hydrolysis and fermentation with Saccharomyces cerevisiae at 30 °C was carried out in a single bioreactor vessel at the same pH (4.5). The obtained bioethanol concentration at 129.2 g/L, with a productivity of 2.94 g/L/h and ethanol yield (YP/S) at 0.50 g EtOH/g total sugar, equivalent to 87.8 % theoretical yield indicates the viability of the proposed innovative process.
PB  - Slovenian Biochemical Society
C3  - Book of Abstracts - 15th Meeting of the Slovenian Biochemical Society with International Participation, 20-23 September 2023, Portorož, Slovenia
T1  - An innovative process for the production of bioethanol: Optimization and kinetic assessment
SP  - P59
UR  - https://hdl.handle.net/21.15107/rcub_cer_7137
ER  - 

@conference{
author = "Šokarda Slavić, Marinela and Margetić, Aleksandra and Dojnov, Biljana and Vujčić, Miroslava and Ristović, Marina and Božić, Nataša and Vujčić, Zoran",
year = "2023",
abstract = "Given the growing concern about the depletion of fossil fuels, global warming, and the loss of natural resources, bioethanol made from sugar cane, molasses, and corn continues to garner interest globally and is regarded as the safest and cleanest alternative to oil. Starch is a widely available renewable carbohydrate from which bioethanol is conventionally obtained through energy demanding liquefaction and saccharification processes. A significant simplification of the process and a reduction of starch processing costs would be possible by applying raw starch hydrolysis using enzymes capable of degrading starch below the gelatinization temperature. A novel strategy for highly concentrated raw corn starch (30 % w/v) hydrolysis based on a modified simultaneous saccharification and fermentation process is optimized for the production of bioethanol. Different ratios of Bacillus paralicheniformis ATCC 9945a (BliAmy) and glucoamylase (Dextrozyme® GA), glucoamylase addition time, incubation time, and pH were investigated using a Box–Behnken experimental design to ensure high process efficiency. A two-step synergistic hydrolysis and fermentation with Saccharomyces cerevisiae at 30 °C was carried out in a single bioreactor vessel at the same pH (4.5). The obtained bioethanol concentration at 129.2 g/L, with a productivity of 2.94 g/L/h and ethanol yield (YP/S) at 0.50 g EtOH/g total sugar, equivalent to 87.8 % theoretical yield indicates the viability of the proposed innovative process.",
publisher = "Slovenian Biochemical Society",
journal = "Book of Abstracts - 15th Meeting of the Slovenian Biochemical Society with International Participation, 20-23 September 2023, Portorož, Slovenia",
title = "An innovative process for the production of bioethanol: Optimization and kinetic assessment",
pages = "P59",
url = "https://hdl.handle.net/21.15107/rcub_cer_7137"
}

Šokarda Slavić, M., Margetić, A., Dojnov, B., Vujčić, M., Ristović, M., Božić, N.,& Vujčić, Z.. (2023). An innovative process for the production of bioethanol: Optimization and kinetic assessment. in Book of Abstracts - 15th Meeting of the Slovenian Biochemical Society with International Participation, 20-23 September 2023, Portorož, Slovenia
Slovenian Biochemical Society., P59.
https://hdl.handle.net/21.15107/rcub_cer_7137

Šokarda Slavić M, Margetić A, Dojnov B, Vujčić M, Ristović M, Božić N, Vujčić Z. An innovative process for the production of bioethanol: Optimization and kinetic assessment. in Book of Abstracts - 15th Meeting of the Slovenian Biochemical Society with International Participation, 20-23 September 2023, Portorož, Slovenia. 2023;:P59.
https://hdl.handle.net/21.15107/rcub_cer_7137 .

Šokarda Slavić, Marinela, Margetić, Aleksandra, Dojnov, Biljana, Vujčić, Miroslava, Ristović, Marina, Božić, Nataša, Vujčić, Zoran, "An innovative process for the production of bioethanol: Optimization and kinetic assessment" in Book of Abstracts - 15th Meeting of the Slovenian Biochemical Society with International Participation, 20-23 September 2023, Portorož, Slovenia (2023):P59,
https://hdl.handle.net/21.15107/rcub_cer_7137 .

TY  - CONF
AU  - Stefanović, Marija
AU  - Savić, Aleksa
AU  - Božić, Nataša
AU  - Vujčić, Zoran
AU  - Radosavljević, Jelena
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7345
AB  - Viral exonucleases play role in many processes essential for genome ma intenance,including DNA repair and recombination. Lambda exonuclease (λ -exo), isolated fromlambda bacteriophage, hydrolases double-stranded DNA (dsDNA) in the highly processivemanner in 5’→3’ direction, yielding mononucleotides and single -stranded DNA (ssDNA).This unique enzymatic properties offer several promising biotechnological applications,such as highly sensitive quantification of DNA modifications and single -moleculesequencing. Hence, optimization of the expression conditions is a prerequisite to achievehigh-level production of λ-exo. Here we have tested λ -exo expression in five different E.coli strains under various temperature regimes in order to establish the optimal conditionsfor efficient production of recombinant λ -exo. The N-terminally His -tagged λ-exo wassuccessfully expressed in E.coli BL21(AI), SHuffle T7, C41(DE3) and C43(DE3) strains inLB broth. Collected aliquots were analysed by SDS-PAGE, followed by CBB staining.Relative yield of target protein bands was determined by densitometry in total cell lysate, aswell as in soluble and insoluble cytoplasmatic fractions. We identified E.coli BL21(AI),SHuffle T7 and C41(DE3) as good producers of recombinant λ -exo, and upon scaling up, λ-exo was purified from crude cell lysates by metal affinity chromatography in satisfactoryyield. Our data suggest that densitometric analysis could serve as a powerful low-costscreening platform for improving recombinant protein expression strategies.
PB  - Prirodno-matematički fakultet, Univerzitet u Kragujevcu
C3  - Zbornik apstrakata, VI Simpozijum Srpskog udruženja za proteomiku (SePA) “Razvoj i primena novih metoda proteomike”, 2. jun 2023. godine, Kragujevac
T1  - Electrophoretic assessment of recombinant λ- exonuclease production in different E. coli strains
SP  - 23
EP  - 23
UR  - https://hdl.handle.net/21.15107/rcub_cer_7345
ER  - 

@conference{
author = "Stefanović, Marija and Savić, Aleksa and Božić, Nataša and Vujčić, Zoran and Radosavljević, Jelena",
year = "2023",
abstract = "Viral exonucleases play role in many processes essential for genome ma intenance,including DNA repair and recombination. Lambda exonuclease (λ -exo), isolated fromlambda bacteriophage, hydrolases double-stranded DNA (dsDNA) in the highly processivemanner in 5’→3’ direction, yielding mononucleotides and single -stranded DNA (ssDNA).This unique enzymatic properties offer several promising biotechnological applications,such as highly sensitive quantification of DNA modifications and single -moleculesequencing. Hence, optimization of the expression conditions is a prerequisite to achievehigh-level production of λ-exo. Here we have tested λ -exo expression in five different E.coli strains under various temperature regimes in order to establish the optimal conditionsfor efficient production of recombinant λ -exo. The N-terminally His -tagged λ-exo wassuccessfully expressed in E.coli BL21(AI), SHuffle T7, C41(DE3) and C43(DE3) strains inLB broth. Collected aliquots were analysed by SDS-PAGE, followed by CBB staining.Relative yield of target protein bands was determined by densitometry in total cell lysate, aswell as in soluble and insoluble cytoplasmatic fractions. We identified E.coli BL21(AI),SHuffle T7 and C41(DE3) as good producers of recombinant λ -exo, and upon scaling up, λ-exo was purified from crude cell lysates by metal affinity chromatography in satisfactoryyield. Our data suggest that densitometric analysis could serve as a powerful low-costscreening platform for improving recombinant protein expression strategies.",
publisher = "Prirodno-matematički fakultet, Univerzitet u Kragujevcu",
journal = "Zbornik apstrakata, VI Simpozijum Srpskog udruženja za proteomiku (SePA) “Razvoj i primena novih metoda proteomike”, 2. jun 2023. godine, Kragujevac",
title = "Electrophoretic assessment of recombinant λ- exonuclease production in different E. coli strains",
pages = "23-23",
url = "https://hdl.handle.net/21.15107/rcub_cer_7345"
}

Stefanović, M., Savić, A., Božić, N., Vujčić, Z.,& Radosavljević, J.. (2023). Electrophoretic assessment of recombinant λ- exonuclease production in different E. coli strains. in Zbornik apstrakata, VI Simpozijum Srpskog udruženja za proteomiku (SePA) “Razvoj i primena novih metoda proteomike”, 2. jun 2023. godine, Kragujevac
Prirodno-matematički fakultet, Univerzitet u Kragujevcu., 23-23.
https://hdl.handle.net/21.15107/rcub_cer_7345

Stefanović M, Savić A, Božić N, Vujčić Z, Radosavljević J. Electrophoretic assessment of recombinant λ- exonuclease production in different E. coli strains. in Zbornik apstrakata, VI Simpozijum Srpskog udruženja za proteomiku (SePA) “Razvoj i primena novih metoda proteomike”, 2. jun 2023. godine, Kragujevac. 2023;:23-23.
https://hdl.handle.net/21.15107/rcub_cer_7345 .

Stefanović, Marija, Savić, Aleksa, Božić, Nataša, Vujčić, Zoran, Radosavljević, Jelena, "Electrophoretic assessment of recombinant λ- exonuclease production in different E. coli strains" in Zbornik apstrakata, VI Simpozijum Srpskog udruženja za proteomiku (SePA) “Razvoj i primena novih metoda proteomike”, 2. jun 2023. godine, Kragujevac (2023):23-23,
https://hdl.handle.net/21.15107/rcub_cer_7345 .

TY  - CONF
AU  - Stefanović, Marija
AU  - Savić, Aleksa
AU  - Božić, Nataša
AU  - Vujčić, Zoran
AU  - Radosavljević, Jelena
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7346
AB  - Viral exonucleases play role in many processes essential for genome ma intenance,including DNA repair and recombination. Lambda exonuclease (λ -exo), isolated fromlambda bacteriophage, hydrolases double-stranded DNA (dsDNA) in the highly processivemanner in 5’→3’ direction, yielding mononucleotides and single -stranded DNA (ssDNA).This unique enzymatic properties offer several promising biotechnological applications,such as highly sensitive quantification of DNA modifications and single -moleculesequencing. Hence, optimization of the expression conditions is a prerequisite to achievehigh-level production of λ-exo. Here we have tested λ -exo expression in five different E.coli strains under various temperature regimes in order to establish the optimal conditionsfor efficient production of recombinant λ -exo. The N-terminally His -tagged λ-exo wassuccessfully expressed in E.coli BL21(AI), SHuffle T7, C41(DE3) and C43(DE3) strains inLB broth. Collected aliquots were analysed by SDS-PAGE, followed by CBB staining.Relative yield of target protein bands was determined by densitometry in total cell lysate, aswell as in soluble and insoluble cytoplasmatic fractions. We identified E.coli BL21(AI),SHuffle T7 and C41(DE3) as good producers of recombinant λ -exo, and upon scaling up, λ-exo was purified from crude cell lysates by metal affinity chromatography in satisfactoryyield. Our data suggest that densitometric analysis could serve as a powerful low-costscreening platform for improving recombinant protein expression strategies.
PB  - Prirodno-matematički fakultet, Univerzitet u Kragujevcu
T1  - Poster presentation: Electrophoretic assessment of recombinant λ- exonuclease production in different E. coli strains
UR  - https://hdl.handle.net/21.15107/rcub_cer_7346
ER  - 

@conference{
author = "Stefanović, Marija and Savić, Aleksa and Božić, Nataša and Vujčić, Zoran and Radosavljević, Jelena",
year = "2023",
abstract = "Viral exonucleases play role in many processes essential for genome ma intenance,including DNA repair and recombination. Lambda exonuclease (λ -exo), isolated fromlambda bacteriophage, hydrolases double-stranded DNA (dsDNA) in the highly processivemanner in 5’→3’ direction, yielding mononucleotides and single -stranded DNA (ssDNA).This unique enzymatic properties offer several promising biotechnological applications,such as highly sensitive quantification of DNA modifications and single -moleculesequencing. Hence, optimization of the expression conditions is a prerequisite to achievehigh-level production of λ-exo. Here we have tested λ -exo expression in five different E.coli strains under various temperature regimes in order to establish the optimal conditionsfor efficient production of recombinant λ -exo. The N-terminally His -tagged λ-exo wassuccessfully expressed in E.coli BL21(AI), SHuffle T7, C41(DE3) and C43(DE3) strains inLB broth. Collected aliquots were analysed by SDS-PAGE, followed by CBB staining.Relative yield of target protein bands was determined by densitometry in total cell lysate, aswell as in soluble and insoluble cytoplasmatic fractions. We identified E.coli BL21(AI),SHuffle T7 and C41(DE3) as good producers of recombinant λ -exo, and upon scaling up, λ-exo was purified from crude cell lysates by metal affinity chromatography in satisfactoryyield. Our data suggest that densitometric analysis could serve as a powerful low-costscreening platform for improving recombinant protein expression strategies.",
publisher = "Prirodno-matematički fakultet, Univerzitet u Kragujevcu",
title = "Poster presentation: Electrophoretic assessment of recombinant λ- exonuclease production in different E. coli strains",
url = "https://hdl.handle.net/21.15107/rcub_cer_7346"
}

Stefanović, M., Savić, A., Božić, N., Vujčić, Z.,& Radosavljević, J.. (2023). Poster presentation: Electrophoretic assessment of recombinant λ- exonuclease production in different E. coli strains. 
Prirodno-matematički fakultet, Univerzitet u Kragujevcu..
https://hdl.handle.net/21.15107/rcub_cer_7346

Stefanović M, Savić A, Božić N, Vujčić Z, Radosavljević J. Poster presentation: Electrophoretic assessment of recombinant λ- exonuclease production in different E. coli strains. 2023;.
https://hdl.handle.net/21.15107/rcub_cer_7346 .

Stefanović, Marija, Savić, Aleksa, Božić, Nataša, Vujčić, Zoran, Radosavljević, Jelena, "Poster presentation: Electrophoretic assessment of recombinant λ- exonuclease production in different E. coli strains" (2023),
https://hdl.handle.net/21.15107/rcub_cer_7346 .

TY  - JOUR
AU  - Pavlović, Ratko
AU  - Dojnov, Biljana
AU  - Šokarda Slavić, Marinela
AU  - Pavlović, Marija
AU  - Slomo, Katarina
AU  - Ristović, Marina
AU  - Vujčić, Zoran
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5593
AB  - Finding a pollen substitute for honey bees that is nutritionally adequate and affordable is a scientific and practical challenge. We attempted a new rational approach and tried to exploit honey bees’ natural cannibalistic behavior. We tested processed insect larvae as a food source that is nutritionally similar to bee brood, and which can easily be produced on a large scale. In cage experiments, monitoring bee mortality, food consumption and changes in bee body parts’ weights showed that flour obtained by grinding dried yellow mealworm larvae has the potential to become an excellent component for pollen substitution. Bees from the cage group fed Tenebrio molitor patties (TG) demonstrated overall best results in comparison to sugar patties fed bee group (CG), yeast patties fed bee group (YG) and pollen patties fed bee group (PG). They did not lose weight as rapidly as the CG, did not defecate inside cages as the YG, nor show increased mortality as the PG. At the same time, TG consumed less food (mean 13.7 g/cage) than CG (16.8 g/cage), YG (20.4 g/cage) and PG (23.9 g/cage) within the period of 28 days. Bees’ gut increase in weight was lowest in the CG, followed by TG and PG and was the highest in the YG which resulted in diarrhea after 14 days. Bees from TG did not lag behind other bees in head, thorax and abdomen weight after 28 days. We demonstrated that processed yellow mealworm larvae (T. molitor) can be used as an ingredient for honey bee feed.
PB  - Informa UK Limited
T2  - Journal of Apicultural Research
T1  - In pursuit of the ultimate pollen substitute (insect larvae) for honey bee (Apis mellifera) feed
VL  - 62
IS  - 5
SP  - 1007
EP  - 1016
DO  - 10.1080/00218839.2022.2080950
ER  - 

@article{
author = "Pavlović, Ratko and Dojnov, Biljana and Šokarda Slavić, Marinela and Pavlović, Marija and Slomo, Katarina and Ristović, Marina and Vujčić, Zoran",
year = "2023",
abstract = "Finding a pollen substitute for honey bees that is nutritionally adequate and affordable is a scientific and practical challenge. We attempted a new rational approach and tried to exploit honey bees’ natural cannibalistic behavior. We tested processed insect larvae as a food source that is nutritionally similar to bee brood, and which can easily be produced on a large scale. In cage experiments, monitoring bee mortality, food consumption and changes in bee body parts’ weights showed that flour obtained by grinding dried yellow mealworm larvae has the potential to become an excellent component for pollen substitution. Bees from the cage group fed Tenebrio molitor patties (TG) demonstrated overall best results in comparison to sugar patties fed bee group (CG), yeast patties fed bee group (YG) and pollen patties fed bee group (PG). They did not lose weight as rapidly as the CG, did not defecate inside cages as the YG, nor show increased mortality as the PG. At the same time, TG consumed less food (mean 13.7 g/cage) than CG (16.8 g/cage), YG (20.4 g/cage) and PG (23.9 g/cage) within the period of 28 days. Bees’ gut increase in weight was lowest in the CG, followed by TG and PG and was the highest in the YG which resulted in diarrhea after 14 days. Bees from TG did not lag behind other bees in head, thorax and abdomen weight after 28 days. We demonstrated that processed yellow mealworm larvae (T. molitor) can be used as an ingredient for honey bee feed.",
publisher = "Informa UK Limited",
journal = "Journal of Apicultural Research",
title = "In pursuit of the ultimate pollen substitute (insect larvae) for honey bee (Apis mellifera) feed",
volume = "62",
number = "5",
pages = "1007-1016",
doi = "10.1080/00218839.2022.2080950"
}

Pavlović, R., Dojnov, B., Šokarda Slavić, M., Pavlović, M., Slomo, K., Ristović, M.,& Vujčić, Z.. (2023). In pursuit of the ultimate pollen substitute (insect larvae) for honey bee (Apis mellifera) feed. in Journal of Apicultural Research
Informa UK Limited., 62(5), 1007-1016.
https://doi.org/10.1080/00218839.2022.2080950

Pavlović R, Dojnov B, Šokarda Slavić M, Pavlović M, Slomo K, Ristović M, Vujčić Z. In pursuit of the ultimate pollen substitute (insect larvae) for honey bee (Apis mellifera) feed. in Journal of Apicultural Research. 2023;62(5):1007-1016.
doi:10.1080/00218839.2022.2080950 .

Pavlović, Ratko, Dojnov, Biljana, Šokarda Slavić, Marinela, Pavlović, Marija, Slomo, Katarina, Ristović, Marina, Vujčić, Zoran, "In pursuit of the ultimate pollen substitute (insect larvae) for honey bee (Apis mellifera) feed" in Journal of Apicultural Research, 62, no. 5 (2023):1007-1016,
https://doi.org/10.1080/00218839.2022.2080950 . .

TY  - CONF
AU  - Margetić, Aleksandra
AU  - Šokarda Slavić, Marinela
AU  - Ristović, Marina
AU  - Stojanović, Sanja
AU  - Pavlović, Marija
AU  - Vujčić, Zoran
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6027
AB  - When textile dyes are released into the water, they can have a range of negative effects on the environment, for example, azo dyes can break down into carcinogenic compounds when exposed to sunlight. Remazol Brilliant Blue R (RBBR) and Reactive Black 5 (RB5) are reactive dyes. Unfortunately, the discharge of untreated effluents from these industries into nature can result in the contamination of water, which can have harmful effects on the environment.
Saccharomyces cerevisiae is widely used in different fields of biotechnology. In this work, the cell walls of used yeast were reused for the biosorption of textile dyes, and the possibility of their utilization in wastewater treatment was investigated. The response surface methodology approach was applied to determine the optimal levels of three input variables - pH, temperature, and time, and also to identify the relationship between the response functions and process variables. Five levels of three variables were used, pH range 2–13, temperature range 15–40°C and time 0.15–30 h. The decolorization processes were optimized using the Central Composite Design. A significant impact of pH and temperature
was found, while satisfactory results in decolorization (≥ 90%) were shown in a short time (up to 1 h). The maximum adsorption capacity (MAC) of the used Saccharomyces cerevisiae cell wall for removing RBBR and RB5 from wastewater was tested according to results obtained by CCD considering the economy of the process (pH 4, 25°C and 1 hour). Experimentally obtained MAC was 400 mg/g and 200 mg/g for RBBR and RB5, respectively.
PB  - European Federation of Biotechnology
C3  - Programme and abstract book - Biotechnology for a circular bioeconomy: carbon capture, waste recycling and mitigation of global warming, 28-29 March 2023, online
T1  - Reusing biomass in textile dyes removing from wastewater
SP  - 62
EP  - 62
UR  - https://hdl.handle.net/21.15107/rcub_cer_6027
ER  - 

@conference{
author = "Margetić, Aleksandra and Šokarda Slavić, Marinela and Ristović, Marina and Stojanović, Sanja and Pavlović, Marija and Vujčić, Zoran",
year = "2023",
abstract = "When textile dyes are released into the water, they can have a range of negative effects on the environment, for example, azo dyes can break down into carcinogenic compounds when exposed to sunlight. Remazol Brilliant Blue R (RBBR) and Reactive Black 5 (RB5) are reactive dyes. Unfortunately, the discharge of untreated effluents from these industries into nature can result in the contamination of water, which can have harmful effects on the environment.
Saccharomyces cerevisiae is widely used in different fields of biotechnology. In this work, the cell walls of used yeast were reused for the biosorption of textile dyes, and the possibility of their utilization in wastewater treatment was investigated. The response surface methodology approach was applied to determine the optimal levels of three input variables - pH, temperature, and time, and also to identify the relationship between the response functions and process variables. Five levels of three variables were used, pH range 2–13, temperature range 15–40°C and time 0.15–30 h. The decolorization processes were optimized using the Central Composite Design. A significant impact of pH and temperature
was found, while satisfactory results in decolorization (≥ 90%) were shown in a short time (up to 1 h). The maximum adsorption capacity (MAC) of the used Saccharomyces cerevisiae cell wall for removing RBBR and RB5 from wastewater was tested according to results obtained by CCD considering the economy of the process (pH 4, 25°C and 1 hour). Experimentally obtained MAC was 400 mg/g and 200 mg/g for RBBR and RB5, respectively.",
publisher = "European Federation of Biotechnology",
journal = "Programme and abstract book - Biotechnology for a circular bioeconomy: carbon capture, waste recycling and mitigation of global warming, 28-29 March 2023, online",
title = "Reusing biomass in textile dyes removing from wastewater",
pages = "62-62",
url = "https://hdl.handle.net/21.15107/rcub_cer_6027"
}

Margetić, A., Šokarda Slavić, M., Ristović, M., Stojanović, S., Pavlović, M.,& Vujčić, Z.. (2023). Reusing biomass in textile dyes removing from wastewater. in Programme and abstract book - Biotechnology for a circular bioeconomy: carbon capture, waste recycling and mitigation of global warming, 28-29 March 2023, online
European Federation of Biotechnology., 62-62.
https://hdl.handle.net/21.15107/rcub_cer_6027

Margetić A, Šokarda Slavić M, Ristović M, Stojanović S, Pavlović M, Vujčić Z. Reusing biomass in textile dyes removing from wastewater. in Programme and abstract book - Biotechnology for a circular bioeconomy: carbon capture, waste recycling and mitigation of global warming, 28-29 March 2023, online. 2023;:62-62.
https://hdl.handle.net/21.15107/rcub_cer_6027 .

Margetić, Aleksandra, Šokarda Slavić, Marinela, Ristović, Marina, Stojanović, Sanja, Pavlović, Marija, Vujčić, Zoran, "Reusing biomass in textile dyes removing from wastewater" in Programme and abstract book - Biotechnology for a circular bioeconomy: carbon capture, waste recycling and mitigation of global warming, 28-29 March 2023, online (2023):62-62,
https://hdl.handle.net/21.15107/rcub_cer_6027 .

TY  - CONF
AU  - Šokarda Slavić, Marinela
AU  - Margetić, Aleksandra
AU  - Ristović, Marina
AU  - Pavlović, Marija
AU  - Stojanović, Sanja
AU  - Drulović, Nenad
AU  - Vujčić, Zoran
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6028
AB  - Fish processing generates a large amount of waste products; nearly 75 % of the total fish weight consists of scales, skins, heads, viscera, and bones. These waste by-products are often dumped in landfills or the ocean, contributing to environmental pollution. Solid fish waste has a high collagen content and can be utilized for the extraction of different products such as gelatine, which can be used in different food and pharmaceutical industries. Fish gelatine contains all biogenic amino acids and can be used as a dietary supplement, thus increasing the utilization of fish waste and reducing environmental pollution.
Recently, a strong worldwide focus has been directed towards the discovery of new microbial proteases for industrial applications. For that purpose, the Bacillus sp. strains from the laboratory bank were screened for the ability to secrete alkaline proteases. Bacterial strains that produced a larger clear zone on the gelatine agar plate were selected for further study. Selected bacterial strains were cultivated under submerged conditions for the purpose of producing proteases. The supernatant from each isolate was used as a crude enzyme extract for testing gelatine proteolytic activity and hydrolysis products. Bacillus sp. strains 12B, 16A, 17B and 24B showed a high degree of hydrolysis of the gelatine waste and the ability to form proteins of small molecular masses after one hour of hydrolysis. Of these, sp. 12B was the most potent, having twice the proteolytic activity determined by the TNBS method.
PB  - European Federation of Biotechnology
C3  - Programme and abstract book - Biotechnology for a circular bioeconomy: carbon capture, waste recycling and mitigation of global warming, 28-29 March 2023, online
T1  - Screening of Bacillus sp. protease for hydrolysis of gelatine extracted from fish waste and potential applications for waste valorisation
SP  - 66
EP  - 66
UR  - https://hdl.handle.net/21.15107/rcub_cer_6028
ER  - 

@conference{
author = "Šokarda Slavić, Marinela and Margetić, Aleksandra and Ristović, Marina and Pavlović, Marija and Stojanović, Sanja and Drulović, Nenad and Vujčić, Zoran",
year = "2023",
abstract = "Fish processing generates a large amount of waste products; nearly 75 % of the total fish weight consists of scales, skins, heads, viscera, and bones. These waste by-products are often dumped in landfills or the ocean, contributing to environmental pollution. Solid fish waste has a high collagen content and can be utilized for the extraction of different products such as gelatine, which can be used in different food and pharmaceutical industries. Fish gelatine contains all biogenic amino acids and can be used as a dietary supplement, thus increasing the utilization of fish waste and reducing environmental pollution.
Recently, a strong worldwide focus has been directed towards the discovery of new microbial proteases for industrial applications. For that purpose, the Bacillus sp. strains from the laboratory bank were screened for the ability to secrete alkaline proteases. Bacterial strains that produced a larger clear zone on the gelatine agar plate were selected for further study. Selected bacterial strains were cultivated under submerged conditions for the purpose of producing proteases. The supernatant from each isolate was used as a crude enzyme extract for testing gelatine proteolytic activity and hydrolysis products. Bacillus sp. strains 12B, 16A, 17B and 24B showed a high degree of hydrolysis of the gelatine waste and the ability to form proteins of small molecular masses after one hour of hydrolysis. Of these, sp. 12B was the most potent, having twice the proteolytic activity determined by the TNBS method.",
publisher = "European Federation of Biotechnology",
journal = "Programme and abstract book - Biotechnology for a circular bioeconomy: carbon capture, waste recycling and mitigation of global warming, 28-29 March 2023, online",
title = "Screening of Bacillus sp. protease for hydrolysis of gelatine extracted from fish waste and potential applications for waste valorisation",
pages = "66-66",
url = "https://hdl.handle.net/21.15107/rcub_cer_6028"
}

Šokarda Slavić, M., Margetić, A., Ristović, M., Pavlović, M., Stojanović, S., Drulović, N.,& Vujčić, Z.. (2023). Screening of Bacillus sp. protease for hydrolysis of gelatine extracted from fish waste and potential applications for waste valorisation. in Programme and abstract book - Biotechnology for a circular bioeconomy: carbon capture, waste recycling and mitigation of global warming, 28-29 March 2023, online
European Federation of Biotechnology., 66-66.
https://hdl.handle.net/21.15107/rcub_cer_6028

Šokarda Slavić M, Margetić A, Ristović M, Pavlović M, Stojanović S, Drulović N, Vujčić Z. Screening of Bacillus sp. protease for hydrolysis of gelatine extracted from fish waste and potential applications for waste valorisation. in Programme and abstract book - Biotechnology for a circular bioeconomy: carbon capture, waste recycling and mitigation of global warming, 28-29 March 2023, online. 2023;:66-66.
https://hdl.handle.net/21.15107/rcub_cer_6028 .

Šokarda Slavić, Marinela, Margetić, Aleksandra, Ristović, Marina, Pavlović, Marija, Stojanović, Sanja, Drulović, Nenad, Vujčić, Zoran, "Screening of Bacillus sp. protease for hydrolysis of gelatine extracted from fish waste and potential applications for waste valorisation" in Programme and abstract book - Biotechnology for a circular bioeconomy: carbon capture, waste recycling and mitigation of global warming, 28-29 March 2023, online (2023):66-66,
https://hdl.handle.net/21.15107/rcub_cer_6028 .

TY  - CONF
AU  - Pavlović, Marija
AU  - Šokarda Slavić, Marinela
AU  - Ristović, Marina
AU  - Margetić, Aleksandra
AU  - Stojanović, Sanja
AU  - Momčilović, Miloš
AU  - Vujčić, Zoran
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6241
AB  - Pectinases are a type of enzymes frequently used in the food industry to clarify, liquefy, and stabilize fruit juices. The main challenge in fruit juice production is the cloudiness of the juice, which is largely caused by the presence of pectic polysaccharides. Endo-pectinases are enzymes that hydrolyze the glycosidic bonds in pectic polymers. Commercial pectinolytic enzymes are typically produced by fungi, with Aspergillus spp. being the most commonly used.
The aim of this research was the production and characterization of a novel endo-pectinase from the Aspergillus tubingensis strain for use in liquefying and clarifying different types of fruit juice. To accomplish this, solid-state fermentation was conducted on agricultural waste, such as sugar beet pulp and wheat bran, to produce pectinolytic enzymes. The resulting crude extract was concentrated via ultrafiltration and used to isolate the endo-pectinase via ammonium sulfate and ethanol precipitation methods. Ion-exchange chromatography technique on DEAE Sephadex A-25 matrix was used for further purification of the endo-pectinase.
The purified enzyme was characterized by the determination of total pectinolytic activity, specific pectinolytic activity, and SDS-PAA gel electrophoresis. The activity of the endo-pectinase was confirmed by a diffusion test and zymography with Ruthenium Red visualization. The resulting enzyme was used to liquefy apricot, banana, apple, quince, strawberry, and orange pulp, with juice yields ranging from 71% to 83%, depending on the fruit used. The juices treated with endo-pectinase showed much higher clarification compared to untreated juices. Additionally, the treated juices demonstrated more pronounced antioxidant properties, as determined through the DPPH assay.
PB  - Serbian Chemical Society
C3  - Abstract Book - XXII Congress EuroFoodChem, June 14-16, 2023, Belgrade, Serbia
T1  - Highly active endo-pectinases from Aspergillus tubingensis: A novel enzyme for fruit processing
SP  - 207
EP  - 207
UR  - https://hdl.handle.net/21.15107/rcub_cer_6241
ER  - 

@conference{
author = "Pavlović, Marija and Šokarda Slavić, Marinela and Ristović, Marina and Margetić, Aleksandra and Stojanović, Sanja and Momčilović, Miloš and Vujčić, Zoran",
year = "2023",
abstract = "Pectinases are a type of enzymes frequently used in the food industry to clarify, liquefy, and stabilize fruit juices. The main challenge in fruit juice production is the cloudiness of the juice, which is largely caused by the presence of pectic polysaccharides. Endo-pectinases are enzymes that hydrolyze the glycosidic bonds in pectic polymers. Commercial pectinolytic enzymes are typically produced by fungi, with Aspergillus spp. being the most commonly used.
The aim of this research was the production and characterization of a novel endo-pectinase from the Aspergillus tubingensis strain for use in liquefying and clarifying different types of fruit juice. To accomplish this, solid-state fermentation was conducted on agricultural waste, such as sugar beet pulp and wheat bran, to produce pectinolytic enzymes. The resulting crude extract was concentrated via ultrafiltration and used to isolate the endo-pectinase via ammonium sulfate and ethanol precipitation methods. Ion-exchange chromatography technique on DEAE Sephadex A-25 matrix was used for further purification of the endo-pectinase.
The purified enzyme was characterized by the determination of total pectinolytic activity, specific pectinolytic activity, and SDS-PAA gel electrophoresis. The activity of the endo-pectinase was confirmed by a diffusion test and zymography with Ruthenium Red visualization. The resulting enzyme was used to liquefy apricot, banana, apple, quince, strawberry, and orange pulp, with juice yields ranging from 71% to 83%, depending on the fruit used. The juices treated with endo-pectinase showed much higher clarification compared to untreated juices. Additionally, the treated juices demonstrated more pronounced antioxidant properties, as determined through the DPPH assay.",
publisher = "Serbian Chemical Society",
journal = "Abstract Book - XXII Congress EuroFoodChem, June 14-16, 2023, Belgrade, Serbia",
title = "Highly active endo-pectinases from Aspergillus tubingensis: A novel enzyme for fruit processing",
pages = "207-207",
url = "https://hdl.handle.net/21.15107/rcub_cer_6241"
}

Pavlović, M., Šokarda Slavić, M., Ristović, M., Margetić, A., Stojanović, S., Momčilović, M.,& Vujčić, Z.. (2023). Highly active endo-pectinases from Aspergillus tubingensis: A novel enzyme for fruit processing. in Abstract Book - XXII Congress EuroFoodChem, June 14-16, 2023, Belgrade, Serbia
Serbian Chemical Society., 207-207.
https://hdl.handle.net/21.15107/rcub_cer_6241

Pavlović M, Šokarda Slavić M, Ristović M, Margetić A, Stojanović S, Momčilović M, Vujčić Z. Highly active endo-pectinases from Aspergillus tubingensis: A novel enzyme for fruit processing. in Abstract Book - XXII Congress EuroFoodChem, June 14-16, 2023, Belgrade, Serbia. 2023;:207-207.
https://hdl.handle.net/21.15107/rcub_cer_6241 .

Pavlović, Marija, Šokarda Slavić, Marinela, Ristović, Marina, Margetić, Aleksandra, Stojanović, Sanja, Momčilović, Miloš, Vujčić, Zoran, "Highly active endo-pectinases from Aspergillus tubingensis: A novel enzyme for fruit processing" in Abstract Book - XXII Congress EuroFoodChem, June 14-16, 2023, Belgrade, Serbia (2023):207-207,
https://hdl.handle.net/21.15107/rcub_cer_6241 .

TY  - CONF
AU  - Ristović, Marina
AU  - Stojanović, Sanja
AU  - Pavlović, Marija
AU  - Margetić, Aleksandra
AU  - Šokarda Slavić, Marinela
AU  - Vujčić, Zoran
AU  - Dojnov, Biljana
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6243
AB  - Xylan makes a significant part of cereals and fruits, which are used in the food industry. Therefore, enzymes that hydrolyze xylan (xylanases) have found application in the modification of cereal-based food, improving the digestibility of animal feed, and improving the texture of bakery products. In the juice industry, the main problems are turbidity, viscosity, and sedimentation during standing, which are caused by polysaccharides present in fruit (pectins, cellulose, and hemicellulose (xylan)). Pineapple, apple, orange, and tomato have a high content of hemicellulose, so xylanases are suitable for improving the properties of these juices. The Aspergillus tubingensis FAT 35 strain (considered safe for use in the food industry) growing on SSF medium composed of corn cob produced a high level of xylanase enzyme (4.03 U∕mL) and not that high pectinase (1.02 U∕mL) and cellulase (1.43 U∕mL) activities at pH 3 which is pH of freshly prepared apple, pineapple and organge juice.. The fermentation extract was used for clarification of pineapple, apple, and orange juice and for increasing the filtration rate and yield of these juices. Results indicate that A. tubigensis xylanase could be used for clarification and improvement of properties of juices of fruits that contain hemicellulose in high proportion.
PB  - Serbian Chemical Society
C3  - Abstract Book - XXII Congress EuroFoodChem, June 14-16, 2023, Belgrade, Serbia
T1  - Highly active xylanase used in juice clarification
SP  - 208
EP  - 208
UR  - https://hdl.handle.net/21.15107/rcub_cer_6243
ER  - 

@conference{
author = "Ristović, Marina and Stojanović, Sanja and Pavlović, Marija and Margetić, Aleksandra and Šokarda Slavić, Marinela and Vujčić, Zoran and Dojnov, Biljana",
year = "2023",
abstract = "Xylan makes a significant part of cereals and fruits, which are used in the food industry. Therefore, enzymes that hydrolyze xylan (xylanases) have found application in the modification of cereal-based food, improving the digestibility of animal feed, and improving the texture of bakery products. In the juice industry, the main problems are turbidity, viscosity, and sedimentation during standing, which are caused by polysaccharides present in fruit (pectins, cellulose, and hemicellulose (xylan)). Pineapple, apple, orange, and tomato have a high content of hemicellulose, so xylanases are suitable for improving the properties of these juices. The Aspergillus tubingensis FAT 35 strain (considered safe for use in the food industry) growing on SSF medium composed of corn cob produced a high level of xylanase enzyme (4.03 U∕mL) and not that high pectinase (1.02 U∕mL) and cellulase (1.43 U∕mL) activities at pH 3 which is pH of freshly prepared apple, pineapple and organge juice.. The fermentation extract was used for clarification of pineapple, apple, and orange juice and for increasing the filtration rate and yield of these juices. Results indicate that A. tubigensis xylanase could be used for clarification and improvement of properties of juices of fruits that contain hemicellulose in high proportion.",
publisher = "Serbian Chemical Society",
journal = "Abstract Book - XXII Congress EuroFoodChem, June 14-16, 2023, Belgrade, Serbia",
title = "Highly active xylanase used in juice clarification",
pages = "208-208",
url = "https://hdl.handle.net/21.15107/rcub_cer_6243"
}

Ristović, M., Stojanović, S., Pavlović, M., Margetić, A., Šokarda Slavić, M., Vujčić, Z.,& Dojnov, B.. (2023). Highly active xylanase used in juice clarification. in Abstract Book - XXII Congress EuroFoodChem, June 14-16, 2023, Belgrade, Serbia
Serbian Chemical Society., 208-208.
https://hdl.handle.net/21.15107/rcub_cer_6243

Ristović M, Stojanović S, Pavlović M, Margetić A, Šokarda Slavić M, Vujčić Z, Dojnov B. Highly active xylanase used in juice clarification. in Abstract Book - XXII Congress EuroFoodChem, June 14-16, 2023, Belgrade, Serbia. 2023;:208-208.
https://hdl.handle.net/21.15107/rcub_cer_6243 .

Ristović, Marina, Stojanović, Sanja, Pavlović, Marija, Margetić, Aleksandra, Šokarda Slavić, Marinela, Vujčić, Zoran, Dojnov, Biljana, "Highly active xylanase used in juice clarification" in Abstract Book - XXII Congress EuroFoodChem, June 14-16, 2023, Belgrade, Serbia (2023):208-208,
https://hdl.handle.net/21.15107/rcub_cer_6243 .

TY  - JOUR
AU  - Pavlović, Marija
AU  - Šokarda Slavić, Marinela
AU  - Ristović, Marina
AU  - Stojanović, Sanja
AU  - Margetić, Aleksandra
AU  - Momčilović, Miloš
AU  - Vujčić, Zoran
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6459
AB  - The main goal of this study was to examine the efficiency of a newly isolated fungus from quince, Aspergillus tubingensis FAT43, to produce the pectinolytic complex using agricultural and industrial waste as the substrate for solid state fermentation. Sugar beet pulp was the most effective substrate inducer of pectinolytic complex synthesis out of all the waste residues examined. For endo-pectinolytic and total pectinolytic activity, respectively, statistical optimization using Placked-Burman Design and Optimal (Custom) Design increased production by 2.22 and 2.15-fold, respectively. Liquification, clarification, and an increase in the amount of reducing sugar in fruit juices (apple, banana, apricot, orange, and quince) processed with pectinolytic complex were identified. Enzymatic pre-treatment considerably increases yield (14%–22%) and clarification (90%). After enzymatic treatment, the best liquefaction was observed in orange juice, whereas the best clarification was obtained in apricot juice. Additionally, the pectinolytic treatment of apricot juice resulted in the highest increase in reducing sugar concentration (11%) compared to all other enzymatically treated juices. Optimizing the production of a highly active pectinolytic complex and its efficient utilization in the processing of fruit juices, including the generation of an increasing amount of waste, are the significant outcomes of this research.
PB  - Oxford University Press
T2  - Letters in Applied Microbiology
T1  - Optimization of solid-state fermentation for enhanced production of pectinolytic complex by Aspergillus tubingensis FAT43 and its application in fruit juice processing
VL  - 76
IS  - 8
SP  - 1
EP  - 10
DO  - 10.1093/lambio/ovad083
ER  - 

@article{
author = "Pavlović, Marija and Šokarda Slavić, Marinela and Ristović, Marina and Stojanović, Sanja and Margetić, Aleksandra and Momčilović, Miloš and Vujčić, Zoran",
year = "2023",
abstract = "The main goal of this study was to examine the efficiency of a newly isolated fungus from quince, Aspergillus tubingensis FAT43, to produce the pectinolytic complex using agricultural and industrial waste as the substrate for solid state fermentation. Sugar beet pulp was the most effective substrate inducer of pectinolytic complex synthesis out of all the waste residues examined. For endo-pectinolytic and total pectinolytic activity, respectively, statistical optimization using Placked-Burman Design and Optimal (Custom) Design increased production by 2.22 and 2.15-fold, respectively. Liquification, clarification, and an increase in the amount of reducing sugar in fruit juices (apple, banana, apricot, orange, and quince) processed with pectinolytic complex were identified. Enzymatic pre-treatment considerably increases yield (14%–22%) and clarification (90%). After enzymatic treatment, the best liquefaction was observed in orange juice, whereas the best clarification was obtained in apricot juice. Additionally, the pectinolytic treatment of apricot juice resulted in the highest increase in reducing sugar concentration (11%) compared to all other enzymatically treated juices. Optimizing the production of a highly active pectinolytic complex and its efficient utilization in the processing of fruit juices, including the generation of an increasing amount of waste, are the significant outcomes of this research.",
publisher = "Oxford University Press",
journal = "Letters in Applied Microbiology",
title = "Optimization of solid-state fermentation for enhanced production of pectinolytic complex by Aspergillus tubingensis FAT43 and its application in fruit juice processing",
volume = "76",
number = "8",
pages = "1-10",
doi = "10.1093/lambio/ovad083"
}

Pavlović, M., Šokarda Slavić, M., Ristović, M., Stojanović, S., Margetić, A., Momčilović, M.,& Vujčić, Z.. (2023). Optimization of solid-state fermentation for enhanced production of pectinolytic complex by Aspergillus tubingensis FAT43 and its application in fruit juice processing. in Letters in Applied Microbiology
Oxford University Press., 76(8), 1-10.
https://doi.org/10.1093/lambio/ovad083

Pavlović M, Šokarda Slavić M, Ristović M, Stojanović S, Margetić A, Momčilović M, Vujčić Z. Optimization of solid-state fermentation for enhanced production of pectinolytic complex by Aspergillus tubingensis FAT43 and its application in fruit juice processing. in Letters in Applied Microbiology. 2023;76(8):1-10.
doi:10.1093/lambio/ovad083 .

Pavlović, Marija, Šokarda Slavić, Marinela, Ristović, Marina, Stojanović, Sanja, Margetić, Aleksandra, Momčilović, Miloš, Vujčić, Zoran, "Optimization of solid-state fermentation for enhanced production of pectinolytic complex by Aspergillus tubingensis FAT43 and its application in fruit juice processing" in Letters in Applied Microbiology, 76, no. 8 (2023):1-10,
https://doi.org/10.1093/lambio/ovad083 . .

TY  - JOUR
AU  - Šokarda Slavić, Marinela
AU  - Kojić, Milan
AU  - Margetić, Aleksandra
AU  - Ristović, Marina
AU  - Pavlović, Marija
AU  - Nikolić, Stefan
AU  - Vujčić, Zoran
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6518
AB  - The combination of b-oligosaccharides from enzymatically hydrolysed barley b-glucan has attracted interest
recently due to its positive effects on human health. This study aimed to assess the impact of the
endo-b-1,3-1,4-glucanase enzyme from Bacillus subtilis 168 on improving the nutritional and bioactive
properties of barley b-glucan. A new procedure for the isolation of b-glucan was developed, at a lower
temperature (45 °C), enabling purity from starch contamination, without affecting the yield (6 g b-glucan
from 100 g of barley flour). The endo-b-1,3-1,4-glucanase is cloned into E. coli pQE_Ek enables the high
production and purification (82% yield, 1.8 mg mL
 1 and 440 U mg
 1) of an enzyme identical to the
natural one (25.5 kDa). The enzymatic reaction showed high efficiency of b-glucan degradation by recombinant
enzyme, giving a mixture of products (of which 3-O-b-cellobiosyl-D-glucose and 3-O-b-cellotriosyl-
D-glucose are the most abundant), the reduction of viscosity (17%) and increase in antioxidant capacities
by 15.2%, 30.9% and 44.0% assessed by ABTS, DPPH and ORAC, respectively. These results indicate
the possible application of endo-b-1,3-1,4-glucanase enzyme in improving the properties of barley bglucan
used as functional foods.
PB  - Wiley
T2  - International Journal of Food Science and Technology
T1  - Improvement of nutritional and bioactive properties of barley β-glucan-based food products using Bacillus subtilis 168 endo-β-1,3-1,4-glucanase
DO  - 10.1111/ijfs.16647
ER  - 

@article{
author = "Šokarda Slavić, Marinela and Kojić, Milan and Margetić, Aleksandra and Ristović, Marina and Pavlović, Marija and Nikolić, Stefan and Vujčić, Zoran",
year = "2023",
abstract = "The combination of b-oligosaccharides from enzymatically hydrolysed barley b-glucan has attracted interest
recently due to its positive effects on human health. This study aimed to assess the impact of the
endo-b-1,3-1,4-glucanase enzyme from Bacillus subtilis 168 on improving the nutritional and bioactive
properties of barley b-glucan. A new procedure for the isolation of b-glucan was developed, at a lower
temperature (45 °C), enabling purity from starch contamination, without affecting the yield (6 g b-glucan
from 100 g of barley flour). The endo-b-1,3-1,4-glucanase is cloned into E. coli pQE_Ek enables the high
production and purification (82% yield, 1.8 mg mL
 1 and 440 U mg
 1) of an enzyme identical to the
natural one (25.5 kDa). The enzymatic reaction showed high efficiency of b-glucan degradation by recombinant
enzyme, giving a mixture of products (of which 3-O-b-cellobiosyl-D-glucose and 3-O-b-cellotriosyl-
D-glucose are the most abundant), the reduction of viscosity (17%) and increase in antioxidant capacities
by 15.2%, 30.9% and 44.0% assessed by ABTS, DPPH and ORAC, respectively. These results indicate
the possible application of endo-b-1,3-1,4-glucanase enzyme in improving the properties of barley bglucan
used as functional foods.",
publisher = "Wiley",
journal = "International Journal of Food Science and Technology",
title = "Improvement of nutritional and bioactive properties of barley β-glucan-based food products using Bacillus subtilis 168 endo-β-1,3-1,4-glucanase",
doi = "10.1111/ijfs.16647"
}

Šokarda Slavić, M., Kojić, M., Margetić, A., Ristović, M., Pavlović, M., Nikolić, S.,& Vujčić, Z.. (2023). Improvement of nutritional and bioactive properties of barley β-glucan-based food products using Bacillus subtilis 168 endo-β-1,3-1,4-glucanase. in International Journal of Food Science and Technology
Wiley..
https://doi.org/10.1111/ijfs.16647

Šokarda Slavić M, Kojić M, Margetić A, Ristović M, Pavlović M, Nikolić S, Vujčić Z. Improvement of nutritional and bioactive properties of barley β-glucan-based food products using Bacillus subtilis 168 endo-β-1,3-1,4-glucanase. in International Journal of Food Science and Technology. 2023;.
doi:10.1111/ijfs.16647 .

Šokarda Slavić, Marinela, Kojić, Milan, Margetić, Aleksandra, Ristović, Marina, Pavlović, Marija, Nikolić, Stefan, Vujčić, Zoran, "Improvement of nutritional and bioactive properties of barley β-glucan-based food products using Bacillus subtilis 168 endo-β-1,3-1,4-glucanase" in International Journal of Food Science and Technology (2023),
https://doi.org/10.1111/ijfs.16647 . .

TY  - CONF
AU  - Pavlović, Marija
AU  - Šokarda Slavić, Marinela
AU  - Kojić, Milan
AU  - Ristović, Marina
AU  - Momčilović, Miloš
AU  - Drulović, Nenad
AU  - Vujčić, Zoran
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7136
AB  - Pectinases are widely used in the fruit juice industry for clarification, liquefaction and stabilization of juices. Primarily, these enzymes are responsible for the breakdown of long and complex molecules in the fruit pulp (pectin). Unlike the combination of polygalacturonase (PG) and pectin esterase (PE) commonly found in commercial products, pectin lyase (PNL) is the only known pectinase capable of breaking down highly esterified pectins (such those found in fruits) into short molecules via a β-elimination mechanism without producing methanol. Methanol is toxic and can be harmful to health. Commercial preparations with PNL as the major component are preferable in juices and wine processing because it avoids the production of methanol, precipitation of pectin partially de-esterified with endogenous calcium, and damage of the volatile ester content responsible for the specific aroma of various fruits. This study reports the first cloning and characterization of a PNL gene, ppr, from Bacillus velezensis, and the deduced amino acid sequence is compared with those of other lyases. In this work, the gene encoding the pectin lyase (PNL; EC 4.2.2.10) from Bacillus velezensis was successfully expressed under optimized conditions for high soluble protein expressions as soluble PNL-6His in E. coli M15[pREP4]. After expression, purification of 6xHis-labeled PNL was performed according to QIAGEN instructions. IMAC fractions were analyzed using SDS-PAGE. After purification, 3-fold purification was observed with a yield of 82%. In this study, we report for the first time a method to express PNL in E. coli and purify it as a pure native enzyme. The cloned PLN was used to clarify and liquefy apple and orange juices and to improve the flavor of these juices. In this way, pulp waste after juice extraction is reduced. Methanol content was determined by gas-liquid chromatography and was not detectable in the clarified juices.
PB  - Elsevier
C3  - Book of Abstracts - 3rd Food Chemistry Conference, 10-12 October 2023, Dresden, Germany
T1  - Highly efficient clarification of fruit juices with new pectin lyase from Bacillus velezensis
SP  - P3.015
UR  - https://hdl.handle.net/21.15107/rcub_cer_7136
ER  - 

@conference{
author = "Pavlović, Marija and Šokarda Slavić, Marinela and Kojić, Milan and Ristović, Marina and Momčilović, Miloš and Drulović, Nenad and Vujčić, Zoran",
year = "2023",
abstract = "Pectinases are widely used in the fruit juice industry for clarification, liquefaction and stabilization of juices. Primarily, these enzymes are responsible for the breakdown of long and complex molecules in the fruit pulp (pectin). Unlike the combination of polygalacturonase (PG) and pectin esterase (PE) commonly found in commercial products, pectin lyase (PNL) is the only known pectinase capable of breaking down highly esterified pectins (such those found in fruits) into short molecules via a β-elimination mechanism without producing methanol. Methanol is toxic and can be harmful to health. Commercial preparations with PNL as the major component are preferable in juices and wine processing because it avoids the production of methanol, precipitation of pectin partially de-esterified with endogenous calcium, and damage of the volatile ester content responsible for the specific aroma of various fruits. This study reports the first cloning and characterization of a PNL gene, ppr, from Bacillus velezensis, and the deduced amino acid sequence is compared with those of other lyases. In this work, the gene encoding the pectin lyase (PNL; EC 4.2.2.10) from Bacillus velezensis was successfully expressed under optimized conditions for high soluble protein expressions as soluble PNL-6His in E. coli M15[pREP4]. After expression, purification of 6xHis-labeled PNL was performed according to QIAGEN instructions. IMAC fractions were analyzed using SDS-PAGE. After purification, 3-fold purification was observed with a yield of 82%. In this study, we report for the first time a method to express PNL in E. coli and purify it as a pure native enzyme. The cloned PLN was used to clarify and liquefy apple and orange juices and to improve the flavor of these juices. In this way, pulp waste after juice extraction is reduced. Methanol content was determined by gas-liquid chromatography and was not detectable in the clarified juices.",
publisher = "Elsevier",
journal = "Book of Abstracts - 3rd Food Chemistry Conference, 10-12 October 2023, Dresden, Germany",
title = "Highly efficient clarification of fruit juices with new pectin lyase from Bacillus velezensis",
pages = "P3.015",
url = "https://hdl.handle.net/21.15107/rcub_cer_7136"
}

Pavlović, M., Šokarda Slavić, M., Kojić, M., Ristović, M., Momčilović, M., Drulović, N.,& Vujčić, Z.. (2023). Highly efficient clarification of fruit juices with new pectin lyase from Bacillus velezensis. in Book of Abstracts - 3rd Food Chemistry Conference, 10-12 October 2023, Dresden, Germany
Elsevier., P3.015.
https://hdl.handle.net/21.15107/rcub_cer_7136

Pavlović M, Šokarda Slavić M, Kojić M, Ristović M, Momčilović M, Drulović N, Vujčić Z. Highly efficient clarification of fruit juices with new pectin lyase from Bacillus velezensis. in Book of Abstracts - 3rd Food Chemistry Conference, 10-12 October 2023, Dresden, Germany. 2023;:P3.015.
https://hdl.handle.net/21.15107/rcub_cer_7136 .

Pavlović, Marija, Šokarda Slavić, Marinela, Kojić, Milan, Ristović, Marina, Momčilović, Miloš, Drulović, Nenad, Vujčić, Zoran, "Highly efficient clarification of fruit juices with new pectin lyase from Bacillus velezensis" in Book of Abstracts - 3rd Food Chemistry Conference, 10-12 October 2023, Dresden, Germany (2023):P3.015,
https://hdl.handle.net/21.15107/rcub_cer_7136 .

TY  - JOUR
AU  - Šokarda Slavić, Marinela
AU  - Ralić, Vanja
AU  - Nastasijević, Branislav
AU  - Matijević, Milica
AU  - Vujčić, Zoran
AU  - Margetić, Aleksandra
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6460
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7407
AB  - Poly(γ-glutamic acid) (PGA), naturally produced by Bacillus species, is a biodegradable, non-toxic, biocompatible, and non-immunogenic negatively charged polymer. Due to its properties, it has found various applications in the food, cosmetic and pharmaceutical industries. In this work, Bacillus subtilis 17B was selected as the best PGA producer among fifty wild-types Bacillus strains tested and characterized as a glutamate-independent producer. The production of PGA by the newly identified strain was optimized and increased tenfold using the Box-Behnken experimental design. The purity of PGA after recovery and purification from the fermentation broth was confirmed by SDS-PAGE followed by Methylene Blue staining. PGA was characterized by ESI MS and used for the preparation of a new nanocomposite with TiO2. The synthesis of PGA/TiO2 nanocomposite, its structural analysis, and cytotoxic effect on the cervical cancer cell line (HeLa cell) was investigated to determine the potential anti-cancer usage of this newly prepared material. Encouraging, PGA/TiO2 nanocomposite showed an increased cytotoxic effect compared to TiO2 alone.
AB  - Поли(γ-глутаминска киселина) (ПГK), коју производе бактерије рода Bacillus, је биоразградив, нетоксичан, биокомпатибилан и неимуноген негативно наелектрисани полимер. Због својих својстава нашао је разноврсну примену у прехрамбеној, козметичкој и фармацеутској индустрији. У овом раду, Bacillus ѕubtilis 17Б је изабран као најбољи ПГК продуцер међу педесетак тестираних природних изолата бактерија из овог рода и окарактерисан као глутамат независтан продуцер. Производња ПГК овим новоидентификованим сојем је оптимизована и десетоструко увећана коришћењем Box-Behnken експерименталног дизајна. Чистоћа ПГК након изоловања и пречишћавања из ферметационе течности је потврђена електрофорезом (SDS-PAGE) након бојења метиленским плавим. ПГК је окарактерисана масеном спекроскопијом (ESI MS) и коришћена за добијање новог нанокомпозита са ТiО2. Синтеза ПГК/ТiО2 нанокомпозита, његова структурна анализа и цитотоксични ефекат на ћелијску линију рака грлића материце (HeLa ћелије) је испитан да би се утврдила потенцијална употреба овог новодобијеног материјала у борби против ћелија рака. Нанокомпозит ПГК/ТiО2показао је повећан цитотоксични ефекат на поменуте ћелије рака у поређењу са самим ТiО2.
PB  - Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - A novel PGA/TiO2 nanocomposite prepared with poly(γ-glutamic acid) from the newly isolated Bacillus subtilis 17B strain
T1  - Нови ПГК/TiO2 нанокомпозит добијен од поли(γ -глутаминске киселине) из новоизолованог соја bacillus subtilis 17B
VL  - 88
IS  - 10
SP  - 985
EP  - 997
DO  - 10.2298/JSC221116011S
ER  - 

@article{
author = "Šokarda Slavić, Marinela and Ralić, Vanja and Nastasijević, Branislav and Matijević, Milica and Vujčić, Zoran and Margetić, Aleksandra",
year = "2023",
abstract = "Poly(γ-glutamic acid) (PGA), naturally produced by Bacillus species, is a biodegradable, non-toxic, biocompatible, and non-immunogenic negatively charged polymer. Due to its properties, it has found various applications in the food, cosmetic and pharmaceutical industries. In this work, Bacillus subtilis 17B was selected as the best PGA producer among fifty wild-types Bacillus strains tested and characterized as a glutamate-independent producer. The production of PGA by the newly identified strain was optimized and increased tenfold using the Box-Behnken experimental design. The purity of PGA after recovery and purification from the fermentation broth was confirmed by SDS-PAGE followed by Methylene Blue staining. PGA was characterized by ESI MS and used for the preparation of a new nanocomposite with TiO2. The synthesis of PGA/TiO2 nanocomposite, its structural analysis, and cytotoxic effect on the cervical cancer cell line (HeLa cell) was investigated to determine the potential anti-cancer usage of this newly prepared material. Encouraging, PGA/TiO2 nanocomposite showed an increased cytotoxic effect compared to TiO2 alone., Поли(γ-глутаминска киселина) (ПГK), коју производе бактерије рода Bacillus, је биоразградив, нетоксичан, биокомпатибилан и неимуноген негативно наелектрисани полимер. Због својих својстава нашао је разноврсну примену у прехрамбеној, козметичкој и фармацеутској индустрији. У овом раду, Bacillus ѕubtilis 17Б је изабран као најбољи ПГК продуцер међу педесетак тестираних природних изолата бактерија из овог рода и окарактерисан као глутамат независтан продуцер. Производња ПГК овим новоидентификованим сојем је оптимизована и десетоструко увећана коришћењем Box-Behnken експерименталног дизајна. Чистоћа ПГК након изоловања и пречишћавања из ферметационе течности је потврђена електрофорезом (SDS-PAGE) након бојења метиленским плавим. ПГК је окарактерисана масеном спекроскопијом (ESI MS) и коришћена за добијање новог нанокомпозита са ТiО2. Синтеза ПГК/ТiО2 нанокомпозита, његова структурна анализа и цитотоксични ефекат на ћелијску линију рака грлића материце (HeLa ћелије) је испитан да би се утврдила потенцијална употреба овог новодобијеног материјала у борби против ћелија рака. Нанокомпозит ПГК/ТiО2показао је повећан цитотоксични ефекат на поменуте ћелије рака у поређењу са самим ТiО2.",
publisher = "Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "A novel PGA/TiO2 nanocomposite prepared with poly(γ-glutamic acid) from the newly isolated Bacillus subtilis 17B strain, Нови ПГК/TiO2 нанокомпозит добијен од поли(γ -глутаминске киселине) из новоизолованог соја bacillus subtilis 17B",
volume = "88",
number = "10",
pages = "985-997",
doi = "10.2298/JSC221116011S"
}

Šokarda Slavić, M., Ralić, V., Nastasijević, B., Matijević, M., Vujčić, Z.,& Margetić, A.. (2023). A novel PGA/TiO2 nanocomposite prepared with poly(γ-glutamic acid) from the newly isolated Bacillus subtilis 17B strain. in Journal of the Serbian Chemical Society
Serbian Chemical Society., 88(10), 985-997.
https://doi.org/10.2298/JSC221116011S

Šokarda Slavić M, Ralić V, Nastasijević B, Matijević M, Vujčić Z, Margetić A. A novel PGA/TiO2 nanocomposite prepared with poly(γ-glutamic acid) from the newly isolated Bacillus subtilis 17B strain. in Journal of the Serbian Chemical Society. 2023;88(10):985-997.
doi:10.2298/JSC221116011S .

Šokarda Slavić, Marinela, Ralić, Vanja, Nastasijević, Branislav, Matijević, Milica, Vujčić, Zoran, Margetić, Aleksandra, "A novel PGA/TiO2 nanocomposite prepared with poly(γ-glutamic acid) from the newly isolated Bacillus subtilis 17B strain" in Journal of the Serbian Chemical Society, 88, no. 10 (2023):985-997,
https://doi.org/10.2298/JSC221116011S . .

TY  - JOUR
AU  - Šokarda Slavić, Marinela
AU  - Ralić, Vanja
AU  - Nastasijević, Branislav
AU  - Matijević, Milica
AU  - Vujčić, Zoran
AU  - Margetić, Aleksandra
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6460
AB  - Poly(γ-glutamic acid) (PGA), naturally produced by Bacillus species, is a biodegradable, non-toxic, biocompatible, and non-immunogenic negatively charged polymer. Due to its properties, it has found various applications in the food, cosmetic and pharmaceutical industries. In this work, Bacillus subtilis 17B was selected as the best PGA producer among fifty wild-types Bacillus strains tested and characterized as a glutamate-independent producer. The production of PGA by the newly identified strain was optimized and increased tenfold using the Box-Behnken experimental design. The purity of PGA after recovery and purification from the fermentation broth was confirmed by SDS-PAGE followed by Methylene Blue staining. PGA was characterized by ESI MS and used for the preparation of a new nanocomposite with TiO2. The synthesis of PGA/TiO2 nanocomposite, its structural analysis, and cytotoxic effect on the cervical cancer cell line (HeLa cell) was investigated to determine the potential anti-cancer usage of this newly prepared material. Encouraging, PGA/TiO2 nanocomposite showed an increased cytotoxic effect compared to TiO2 alone.
AB  - Поли(γ-глутаминска киселина) (ПГK), коју производе бактерије рода Bacillus, је биоразградив, нетоксичан, биокомпатибилан и неимуноген негативно наелектрисани полимер. Због својих својстава нашао је разноврсну примену у прехрамбеној, козметичкој и фармацеутској индустрији. У овом раду, Bacillus ѕubtilis 17Б је изабран као најбољи ПГК продуцер међу педесетак тестираних природних изолата бактерија из овог рода и окарактерисан као глутамат независтан продуцер. Производња ПГК овим новоидентификованим сојем је оптимизована и десетоструко увећана коришћењем Box-Behnken експерименталног дизајна. Чистоћа ПГК након изоловања и пречишћавања из ферметационе течности је потврђена електрофорезом (SDS-PAGE) након бојења метиленским плавим. ПГК је окарактерисана масеном спекроскопијом (ESI MS) и коришћена за добијање новог нанокомпозита са ТiО2. Синтеза ПГК/ТiО2 нанокомпозита, његова структурна анализа и цитотоксични ефекат на 
ћелијску линију рака грлића материце (HeLa ћелије) је испитан да би се утврдила потенцијална 
употреба овог новодобијеног материјала у борби против ћелија рака. Нанокомпозит ПГК/ТiО2
показао је повећан цитотоксични ефекат на поменуте ћелије рака у поређењу са самим ТiО2.
PB  - Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - A novel PGA/TiO2 nanocomposite prepared with poly(γ-glutamic acid) from the newly isolated Bacillus subtilis 17B strain
T1  - Нови ПГК/TiO2 нанокомпозит добијен од поли(γ -глутаминске киселине) из новоизолованог соја bacillus subtilis 17B
VL  - 88
IS  - 10
SP  - 985
EP  - 997
DO  - 10.2298/JSC221116011S
ER  - 

@article{
author = "Šokarda Slavić, Marinela and Ralić, Vanja and Nastasijević, Branislav and Matijević, Milica and Vujčić, Zoran and Margetić, Aleksandra",
year = "2023",
abstract = "Poly(γ-glutamic acid) (PGA), naturally produced by Bacillus species, is a biodegradable, non-toxic, biocompatible, and non-immunogenic negatively charged polymer. Due to its properties, it has found various applications in the food, cosmetic and pharmaceutical industries. In this work, Bacillus subtilis 17B was selected as the best PGA producer among fifty wild-types Bacillus strains tested and characterized as a glutamate-independent producer. The production of PGA by the newly identified strain was optimized and increased tenfold using the Box-Behnken experimental design. The purity of PGA after recovery and purification from the fermentation broth was confirmed by SDS-PAGE followed by Methylene Blue staining. PGA was characterized by ESI MS and used for the preparation of a new nanocomposite with TiO2. The synthesis of PGA/TiO2 nanocomposite, its structural analysis, and cytotoxic effect on the cervical cancer cell line (HeLa cell) was investigated to determine the potential anti-cancer usage of this newly prepared material. Encouraging, PGA/TiO2 nanocomposite showed an increased cytotoxic effect compared to TiO2 alone., Поли(γ-глутаминска киселина) (ПГK), коју производе бактерије рода Bacillus, је биоразградив, нетоксичан, биокомпатибилан и неимуноген негативно наелектрисани полимер. Због својих својстава нашао је разноврсну примену у прехрамбеној, козметичкој и фармацеутској индустрији. У овом раду, Bacillus ѕubtilis 17Б је изабран као најбољи ПГК продуцер међу педесетак тестираних природних изолата бактерија из овог рода и окарактерисан као глутамат независтан продуцер. Производња ПГК овим новоидентификованим сојем је оптимизована и десетоструко увећана коришћењем Box-Behnken експерименталног дизајна. Чистоћа ПГК након изоловања и пречишћавања из ферметационе течности је потврђена електрофорезом (SDS-PAGE) након бојења метиленским плавим. ПГК је окарактерисана масеном спекроскопијом (ESI MS) и коришћена за добијање новог нанокомпозита са ТiО2. Синтеза ПГК/ТiО2 нанокомпозита, његова структурна анализа и цитотоксични ефекат на 
ћелијску линију рака грлића материце (HeLa ћелије) је испитан да би се утврдила потенцијална 
употреба овог новодобијеног материјала у борби против ћелија рака. Нанокомпозит ПГК/ТiО2
показао је повећан цитотоксични ефекат на поменуте ћелије рака у поређењу са самим ТiО2.",
publisher = "Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "A novel PGA/TiO2 nanocomposite prepared with poly(γ-glutamic acid) from the newly isolated Bacillus subtilis 17B strain, Нови ПГК/TiO2 нанокомпозит добијен од поли(γ -глутаминске киселине) из новоизолованог соја bacillus subtilis 17B",
volume = "88",
number = "10",
pages = "985-997",
doi = "10.2298/JSC221116011S"
}

Šokarda Slavić, M., Ralić, V., Nastasijević, B., Matijević, M., Vujčić, Z.,& Margetić, A.. (2023). A novel PGA/TiO2 nanocomposite prepared with poly(γ-glutamic acid) from the newly isolated Bacillus subtilis 17B strain. in Journal of the Serbian Chemical Society
Serbian Chemical Society., 88(10), 985-997.
https://doi.org/10.2298/JSC221116011S

Šokarda Slavić M, Ralić V, Nastasijević B, Matijević M, Vujčić Z, Margetić A. A novel PGA/TiO2 nanocomposite prepared with poly(γ-glutamic acid) from the newly isolated Bacillus subtilis 17B strain. in Journal of the Serbian Chemical Society. 2023;88(10):985-997.
doi:10.2298/JSC221116011S .

Šokarda Slavić, Marinela, Ralić, Vanja, Nastasijević, Branislav, Matijević, Milica, Vujčić, Zoran, Margetić, Aleksandra, "A novel PGA/TiO2 nanocomposite prepared with poly(γ-glutamic acid) from the newly isolated Bacillus subtilis 17B strain" in Journal of the Serbian Chemical Society, 88, no. 10 (2023):985-997,
https://doi.org/10.2298/JSC221116011S . .

TY  - CONF
AU  - Stojanović, Sanja
AU  - Stepanović, Jelena
AU  - Ristović, Marina
AU  - Dojnov, Biljana
AU  - Božić, Nataša
AU  - Duduk, Bojan
AU  - Vujčić, Zoran
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5920
AB  - Fungal inulinases have wide application in industrial biotechnology, and it is presumed that their expression is regulated at the transcriptional level via promoter. It is also known that different sugars have an inducing effect on gene expression in fungal genome, including inulinases. Aim of this work was to determine which of the sugars used in growth medium, as the only carbon source, induce the extracellular exoinulinase gene inuE expression in Aspergillus welwitschiae FAW1. Inulin, rafinose, sucrose, glucose and fructose were used as carbon sources, and expression of inuE was monitored during 72 h of cultivation (tested after 24, 36, 48 and 72 h). Both, presence of mRNA in the mycelia and extracellular enzyme activity in the growth media were monitored. Interestingly,
obtained results showed that inuE was induced by fructose, sucrose and rafinose and not by inulin. In all cases, the highest mRNA was detected after 24 h of cultivation, while extracellular exoinulinase activity increased from 24 h with a peak in 72 h. Further experiments are necessary for a comprehensive understanding of the regulation mechanisms of AweinuE promoter for its more purposeful application in biotechnology.
PB  - University of Belgrade - Faculty of Chemistry
PB  - Serbian Biochemical Society
C3  - Proceedings - XI Conference of Serbian Biochemical Society "Amazing Biochemistry", 22.09.2022. Novi Sad, Serbia, 2022
T1  - Exoinulinase gene expression in Aspergillus welwitschiae FAW1 induced by different carbon sources
SP  - 141
UR  - https://hdl.handle.net/21.15107/rcub_cer_5920
ER  - 

@conference{
author = "Stojanović, Sanja and Stepanović, Jelena and Ristović, Marina and Dojnov, Biljana and Božić, Nataša and Duduk, Bojan and Vujčić, Zoran",
year = "2022",
abstract = "Fungal inulinases have wide application in industrial biotechnology, and it is presumed that their expression is regulated at the transcriptional level via promoter. It is also known that different sugars have an inducing effect on gene expression in fungal genome, including inulinases. Aim of this work was to determine which of the sugars used in growth medium, as the only carbon source, induce the extracellular exoinulinase gene inuE expression in Aspergillus welwitschiae FAW1. Inulin, rafinose, sucrose, glucose and fructose were used as carbon sources, and expression of inuE was monitored during 72 h of cultivation (tested after 24, 36, 48 and 72 h). Both, presence of mRNA in the mycelia and extracellular enzyme activity in the growth media were monitored. Interestingly,
obtained results showed that inuE was induced by fructose, sucrose and rafinose and not by inulin. In all cases, the highest mRNA was detected after 24 h of cultivation, while extracellular exoinulinase activity increased from 24 h with a peak in 72 h. Further experiments are necessary for a comprehensive understanding of the regulation mechanisms of AweinuE promoter for its more purposeful application in biotechnology.",
publisher = "University of Belgrade - Faculty of Chemistry, Serbian Biochemical Society",
journal = "Proceedings - XI Conference of Serbian Biochemical Society "Amazing Biochemistry", 22.09.2022. Novi Sad, Serbia, 2022",
title = "Exoinulinase gene expression in Aspergillus welwitschiae FAW1 induced by different carbon sources",
pages = "141",
url = "https://hdl.handle.net/21.15107/rcub_cer_5920"
}

Stojanović, S., Stepanović, J., Ristović, M., Dojnov, B., Božić, N., Duduk, B.,& Vujčić, Z.. (2022). Exoinulinase gene expression in Aspergillus welwitschiae FAW1 induced by different carbon sources. in Proceedings - XI Conference of Serbian Biochemical Society "Amazing Biochemistry", 22.09.2022. Novi Sad, Serbia, 2022
University of Belgrade - Faculty of Chemistry., 141.
https://hdl.handle.net/21.15107/rcub_cer_5920

Stojanović S, Stepanović J, Ristović M, Dojnov B, Božić N, Duduk B, Vujčić Z. Exoinulinase gene expression in Aspergillus welwitschiae FAW1 induced by different carbon sources. in Proceedings - XI Conference of Serbian Biochemical Society "Amazing Biochemistry", 22.09.2022. Novi Sad, Serbia, 2022. 2022;:141.
https://hdl.handle.net/21.15107/rcub_cer_5920 .

Stojanović, Sanja, Stepanović, Jelena, Ristović, Marina, Dojnov, Biljana, Božić, Nataša, Duduk, Bojan, Vujčić, Zoran, "Exoinulinase gene expression in Aspergillus welwitschiae FAW1 induced by different carbon sources" in Proceedings - XI Conference of Serbian Biochemical Society "Amazing Biochemistry", 22.09.2022. Novi Sad, Serbia, 2022 (2022):141,
https://hdl.handle.net/21.15107/rcub_cer_5920 .

TY  - CONF
AU  - Pavlović, Marija
AU  - Margetić, Aleksandra
AU  - Šokarda Slavić, Marinela
AU  - Ristović, Marina
AU  - Pavlović, Ratko
AU  - Nikolić, Stefan
AU  - Vujčić, Zoran
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5840
AB  - Pectinases are widely used in the fruit juice industry for clarification, liquefaction and stabilization of juices. One of the biggest problems in the production of fruit juices is the turbidity of the juice, which is mainly caused by the presence of pectin polysaccharides. Therefore, pectinase is used in juice clarification, which breaks down the pectin structure and reduces unwanted cloudiness and sediment. In this work, the production of pectinases was optimized by solid state fermentation using Aspergillus tubingensis strain, which proved to be an efficient producer of these enzymes. Statistical method Design of Experiment was used to optimize the medium and conditions for enzyme production. The total pectinase activity obtained was determined by the DNS method (47 U/mL). Endo-pectinases activity is determined by reduction of viscosity of pectin solutions. The resulting complex of pectinase enzymes was used for the liquefaction of apricot and blueberry pulp, with a juice yield of 72% and 81%, respectively. Also, apricot juice treated with enzymes was clarified by 77% compared to juice that was not treated with enzymes. Blueberry juice obtained after treatment with pectinase enzymes has a higher antioxidant activity than the untreated juice, as determined by the DPPH assay.
PB  - University of Belgrade - Faculty of Chemistry
PB  - Serbian Biochemical Society
C3  - Proceedings - XI Conference of Serbian Biochemical Society "Amazing Biochemistry", 22.09.2022. Novi Sad, Serbia
T1  - Production and application of pectinases in the liquefaction of apricot and blueberry juice
SP  - 115
EP  - 116
UR  - https://hdl.handle.net/21.15107/rcub_cer_5840
ER  - 

@conference{
author = "Pavlović, Marija and Margetić, Aleksandra and Šokarda Slavić, Marinela and Ristović, Marina and Pavlović, Ratko and Nikolić, Stefan and Vujčić, Zoran",
year = "2022",
abstract = "Pectinases are widely used in the fruit juice industry for clarification, liquefaction and stabilization of juices. One of the biggest problems in the production of fruit juices is the turbidity of the juice, which is mainly caused by the presence of pectin polysaccharides. Therefore, pectinase is used in juice clarification, which breaks down the pectin structure and reduces unwanted cloudiness and sediment. In this work, the production of pectinases was optimized by solid state fermentation using Aspergillus tubingensis strain, which proved to be an efficient producer of these enzymes. Statistical method Design of Experiment was used to optimize the medium and conditions for enzyme production. The total pectinase activity obtained was determined by the DNS method (47 U/mL). Endo-pectinases activity is determined by reduction of viscosity of pectin solutions. The resulting complex of pectinase enzymes was used for the liquefaction of apricot and blueberry pulp, with a juice yield of 72% and 81%, respectively. Also, apricot juice treated with enzymes was clarified by 77% compared to juice that was not treated with enzymes. Blueberry juice obtained after treatment with pectinase enzymes has a higher antioxidant activity than the untreated juice, as determined by the DPPH assay.",
publisher = "University of Belgrade - Faculty of Chemistry, Serbian Biochemical Society",
journal = "Proceedings - XI Conference of Serbian Biochemical Society "Amazing Biochemistry", 22.09.2022. Novi Sad, Serbia",
title = "Production and application of pectinases in the liquefaction of apricot and blueberry juice",
pages = "115-116",
url = "https://hdl.handle.net/21.15107/rcub_cer_5840"
}

Pavlović, M., Margetić, A., Šokarda Slavić, M., Ristović, M., Pavlović, R., Nikolić, S.,& Vujčić, Z.. (2022). Production and application of pectinases in the liquefaction of apricot and blueberry juice. in Proceedings - XI Conference of Serbian Biochemical Society "Amazing Biochemistry", 22.09.2022. Novi Sad, Serbia
University of Belgrade - Faculty of Chemistry., 115-116.
https://hdl.handle.net/21.15107/rcub_cer_5840

Pavlović M, Margetić A, Šokarda Slavić M, Ristović M, Pavlović R, Nikolić S, Vujčić Z. Production and application of pectinases in the liquefaction of apricot and blueberry juice. in Proceedings - XI Conference of Serbian Biochemical Society "Amazing Biochemistry", 22.09.2022. Novi Sad, Serbia. 2022;:115-116.
https://hdl.handle.net/21.15107/rcub_cer_5840 .

Pavlović, Marija, Margetić, Aleksandra, Šokarda Slavić, Marinela, Ristović, Marina, Pavlović, Ratko, Nikolić, Stefan, Vujčić, Zoran, "Production and application of pectinases in the liquefaction of apricot and blueberry juice" in Proceedings - XI Conference of Serbian Biochemical Society "Amazing Biochemistry", 22.09.2022. Novi Sad, Serbia (2022):115-116,
https://hdl.handle.net/21.15107/rcub_cer_5840 .

TY  - CONF
AU  - Pavlović, Ratko
AU  - Dojnov, Biljana
AU  - Šokarda Slavić, Marinela
AU  - Pavlović, Marija
AU  - Tomić, Nevena
AU  - Mišić, Milan
AU  - Vujčić, Zoran
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5885
AB  - Feeding of honey bee (Apis mellifera) is a challenge for beekeepers and formulation of food supplements is improved continuously. When natural food sources are scarce or not available, supplemental foods are widely used to support and build up honey bee colonies. Influence of commercial (sugar) patty and the patties enriched with 12.5% pollen and 12.5% dried yeast on protease expression in honey bee adults is presented. This is part of a wider study aimed to compare the expression of digestive enzymes using different patties. Data collected in this study can be useful for development of higher quality of food supplements for honey bees.
Honey bees were kept in an incubator for 21 days, at a temperature of 35°C and at 80% humidity. In each cage there were one hundred bees and a piece of honeycomb. Midgut samples were taken after 7, 14 and 21 days, homogenized and analyzed for protein concentration and protease activity.
The highest protein concentration was detected in the midgut of pollen fed bees, and lowest in commercial patty fed group, determined by the Bradford method. Protease activity was the highest in bee’s midgut fed with pollen patties, and the lowest in bees fed commercial patties which is shown by enzyme assay and by zymograms. There were different protease isoforms present in bees fed pollen, yeast and commercial patties, but the major isoforms were the same.
The observed decrease in protease activity over time in all groups is probably due to the transition to foraging tasks. Reduced protease activity in the gut of bees fed commercial patties is due to a lack of proteins or some other inducers present in food.
Because pollen is honey bee natural food, we conclude that food supplements that induce similar enzyme expression as pollen (dried yeast) can be considered as appropriate food substitution, because it is superior to supplements which induce very different enzyme expression.
PB  - University of Belgrade – Faculty of Biology
C3  - Abstract Book - 9th European Congress of Apidology - EurBee 9, September 20-22, 2022, Belgrade, Serbia
T1  - Expression of protease in adult honey bees fed with different patties
SP  - 172
UR  - https://hdl.handle.net/21.15107/rcub_cer_5885
ER  - 

@conference{
author = "Pavlović, Ratko and Dojnov, Biljana and Šokarda Slavić, Marinela and Pavlović, Marija and Tomić, Nevena and Mišić, Milan and Vujčić, Zoran",
year = "2022",
abstract = "Feeding of honey bee (Apis mellifera) is a challenge for beekeepers and formulation of food supplements is improved continuously. When natural food sources are scarce or not available, supplemental foods are widely used to support and build up honey bee colonies. Influence of commercial (sugar) patty and the patties enriched with 12.5% pollen and 12.5% dried yeast on protease expression in honey bee adults is presented. This is part of a wider study aimed to compare the expression of digestive enzymes using different patties. Data collected in this study can be useful for development of higher quality of food supplements for honey bees.
Honey bees were kept in an incubator for 21 days, at a temperature of 35°C and at 80% humidity. In each cage there were one hundred bees and a piece of honeycomb. Midgut samples were taken after 7, 14 and 21 days, homogenized and analyzed for protein concentration and protease activity.
The highest protein concentration was detected in the midgut of pollen fed bees, and lowest in commercial patty fed group, determined by the Bradford method. Protease activity was the highest in bee’s midgut fed with pollen patties, and the lowest in bees fed commercial patties which is shown by enzyme assay and by zymograms. There were different protease isoforms present in bees fed pollen, yeast and commercial patties, but the major isoforms were the same.
The observed decrease in protease activity over time in all groups is probably due to the transition to foraging tasks. Reduced protease activity in the gut of bees fed commercial patties is due to a lack of proteins or some other inducers present in food.
Because pollen is honey bee natural food, we conclude that food supplements that induce similar enzyme expression as pollen (dried yeast) can be considered as appropriate food substitution, because it is superior to supplements which induce very different enzyme expression.",
publisher = "University of Belgrade – Faculty of Biology",
journal = "Abstract Book - 9th European Congress of Apidology - EurBee 9, September 20-22, 2022, Belgrade, Serbia",
title = "Expression of protease in adult honey bees fed with different patties",
pages = "172",
url = "https://hdl.handle.net/21.15107/rcub_cer_5885"
}

Pavlović, R., Dojnov, B., Šokarda Slavić, M., Pavlović, M., Tomić, N., Mišić, M.,& Vujčić, Z.. (2022). Expression of protease in adult honey bees fed with different patties. in Abstract Book - 9th European Congress of Apidology - EurBee 9, September 20-22, 2022, Belgrade, Serbia
University of Belgrade – Faculty of Biology., 172.
https://hdl.handle.net/21.15107/rcub_cer_5885

Pavlović R, Dojnov B, Šokarda Slavić M, Pavlović M, Tomić N, Mišić M, Vujčić Z. Expression of protease in adult honey bees fed with different patties. in Abstract Book - 9th European Congress of Apidology - EurBee 9, September 20-22, 2022, Belgrade, Serbia. 2022;:172.
https://hdl.handle.net/21.15107/rcub_cer_5885 .

Pavlović, Ratko, Dojnov, Biljana, Šokarda Slavić, Marinela, Pavlović, Marija, Tomić, Nevena, Mišić, Milan, Vujčić, Zoran, "Expression of protease in adult honey bees fed with different patties" in Abstract Book - 9th European Congress of Apidology - EurBee 9, September 20-22, 2022, Belgrade, Serbia (2022):172,
https://hdl.handle.net/21.15107/rcub_cer_5885 .

TY  - JOUR
AU  - Stojanović, Sanja
AU  - Ristović, Marina
AU  - Stepanović, Jelena
AU  - Margetić, Aleksandra
AU  - Duduk, Bojan
AU  - Vujčić, Zoran
AU  - Dojnov, Biljana
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5360
AB  - Production of fructooligosaccharides (FOS) is a trending topic due to their prebiotic effect becoming increasingly important for the modern human diet. The most suitable process for FOS production is the one using fungal inulinases. Introduction of new fungal inulinase producers and their implementation in production of inulinase enzymes is therefore gaining interest. This study provides a new approach to FOS synthesis by fungal enzyme complex without prior separation of any specific enzyme. Inulinase enzyme complexes could be used for the synthesis of FOS in two possible ways – hydrolysis of inulin (FOSh) and transfructosylation process of sucrose (FOSs), as demonstrated here. Depending on the fungal growth inducing substrate, a variety of inulinase enzyme complexes was obtained – one of which was most successful in production of FOSh and another one of FOSs. Substrates derived from crops: triticale, wheat bran, Jerusalem artichoke and Aspergillus welwitschiae isolate, previously proven as safe for use in food, were utilized for production of inulinase enzyme cocktails. The highest FOSs production was obtained by enzyme complex rich in β-fructofuranosidase, while the highest FOSh production was obtained by enzyme complex rich in endoinulinase. Both FOSh and FOSs showed antioxidant potential according to ABTS and ORAC, which classifies them as a suitable additive in functional food. Simultaneous zymographic detection of inulinase enzymes, which could contribute to expansion of the knowledge on fungal enzymes, was developed and applied here. It demonstrated the presence of different inulinase isoforms depending on fungal growth substrate. These findings, which rely on the innate ability of fungi to co-produce all inulinases from a cocktail, could be useful as a new, easy approach to FOS production by fungal enzymes without their separation and purification, contributing to cheaper and faster production processes.
PB  - Elsevier
T2  - Food Research International
T1  - Aspergillus welwitschiae inulinase enzyme cocktails obtained on agro-material inducers for the purpose of fructooligosaccharides production
VL  - 160
SP  - 111755
DO  - 10.1016/j.foodres.2022.111755
ER  - 

@article{
author = "Stojanović, Sanja and Ristović, Marina and Stepanović, Jelena and Margetić, Aleksandra and Duduk, Bojan and Vujčić, Zoran and Dojnov, Biljana",
year = "2022",
abstract = "Production of fructooligosaccharides (FOS) is a trending topic due to their prebiotic effect becoming increasingly important for the modern human diet. The most suitable process for FOS production is the one using fungal inulinases. Introduction of new fungal inulinase producers and their implementation in production of inulinase enzymes is therefore gaining interest. This study provides a new approach to FOS synthesis by fungal enzyme complex without prior separation of any specific enzyme. Inulinase enzyme complexes could be used for the synthesis of FOS in two possible ways – hydrolysis of inulin (FOSh) and transfructosylation process of sucrose (FOSs), as demonstrated here. Depending on the fungal growth inducing substrate, a variety of inulinase enzyme complexes was obtained – one of which was most successful in production of FOSh and another one of FOSs. Substrates derived from crops: triticale, wheat bran, Jerusalem artichoke and Aspergillus welwitschiae isolate, previously proven as safe for use in food, were utilized for production of inulinase enzyme cocktails. The highest FOSs production was obtained by enzyme complex rich in β-fructofuranosidase, while the highest FOSh production was obtained by enzyme complex rich in endoinulinase. Both FOSh and FOSs showed antioxidant potential according to ABTS and ORAC, which classifies them as a suitable additive in functional food. Simultaneous zymographic detection of inulinase enzymes, which could contribute to expansion of the knowledge on fungal enzymes, was developed and applied here. It demonstrated the presence of different inulinase isoforms depending on fungal growth substrate. These findings, which rely on the innate ability of fungi to co-produce all inulinases from a cocktail, could be useful as a new, easy approach to FOS production by fungal enzymes without their separation and purification, contributing to cheaper and faster production processes.",
publisher = "Elsevier",
journal = "Food Research International",
title = "Aspergillus welwitschiae inulinase enzyme cocktails obtained on agro-material inducers for the purpose of fructooligosaccharides production",
volume = "160",
pages = "111755",
doi = "10.1016/j.foodres.2022.111755"
}

Stojanović, S., Ristović, M., Stepanović, J., Margetić, A., Duduk, B., Vujčić, Z.,& Dojnov, B.. (2022). Aspergillus welwitschiae inulinase enzyme cocktails obtained on agro-material inducers for the purpose of fructooligosaccharides production. in Food Research International
Elsevier., 160, 111755.
https://doi.org/10.1016/j.foodres.2022.111755

Stojanović S, Ristović M, Stepanović J, Margetić A, Duduk B, Vujčić Z, Dojnov B. Aspergillus welwitschiae inulinase enzyme cocktails obtained on agro-material inducers for the purpose of fructooligosaccharides production. in Food Research International. 2022;160:111755.
doi:10.1016/j.foodres.2022.111755 .

Stojanović, Sanja, Ristović, Marina, Stepanović, Jelena, Margetić, Aleksandra, Duduk, Bojan, Vujčić, Zoran, Dojnov, Biljana, "Aspergillus welwitschiae inulinase enzyme cocktails obtained on agro-material inducers for the purpose of fructooligosaccharides production" in Food Research International, 160 (2022):111755,
https://doi.org/10.1016/j.foodres.2022.111755 . .

TY  - CONF
AU  - Mišić, Milan
AU  - Drulović, Nenad
AU  - Margetić, Aleksandra
AU  - Vujčić, Zoran
AU  - Vujčić, Miroslava
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5841
AB  - Polyphenols are a large group of natural organic compounds mainly found in plants, in whom they have diverse protective and metabolic functions. It’s also known that phenolic compounds, especially tannins, interact with proteins in various significant and distinct ways. Tannins also complex proteins, which generally precipitates them and it’s their most important industrially utilised characteristic. This study, which was a continuation of our previous work, focused on interactions of aqueous tea plant extracts with laccase from Trametes 63ersicolour and β-amylase from Ipomoea batatas. Tea plants used in this study wereSaturejamontana, Menthapiperita, Salvia officinalis, Matricariachamomilla, Camellia cinensis and Arctostaphylosuva-ursi. Total phenolic content was determined using Folin-Ciocalteu reagent, which showed us that chosen plants vary considerably in their total phenolic content and the highest concentration was found to be in Arctostaphylosuva-ursi. Protein interactions between tea plant extracts were measured using spectrophotometric, spectrofluorimetric and electrophoretic methods. These methods showed that tea plant extracts lead to various structural changes within the protein, nature of which require 
further research. Finally, it was also found that all tea plant extracts, except Matricariachamomillaextract, reversibly precipitate β-amylase – whilst retaining most of 
its enzymatic activity after dissolving.Best results were obtained using Arctostaphylosuva-ursi extract, which precipitated the highest quantity of β-amylase, with highest activity retention. Although being an interesting phenomenon, furtherresearch is necessary to determine the nature andimportance of reversible tannic enzyme precipitation.
PB  - Serbian Chemical Society
C3  - Book of Abstracts, Proceedings - 58th Meeting of the Serbian Chemical Society, Belgrade, Serbia, June 9-10, 2022 / Kratki izvodi radova, kjniga radova - 58. Savetovanje Srpskog hemijskog društva, Beograd 9. i 10. jun 2022. godine
T1  - Protein interactions of six tea plant extracts
SP  - 63
UR  - https://hdl.handle.net/21.15107/rcub_cer_5841
ER  - 

@conference{
author = "Mišić, Milan and Drulović, Nenad and Margetić, Aleksandra and Vujčić, Zoran and Vujčić, Miroslava",
year = "2022",
abstract = "Polyphenols are a large group of natural organic compounds mainly found in plants, in whom they have diverse protective and metabolic functions. It’s also known that phenolic compounds, especially tannins, interact with proteins in various significant and distinct ways. Tannins also complex proteins, which generally precipitates them and it’s their most important industrially utilised characteristic. This study, which was a continuation of our previous work, focused on interactions of aqueous tea plant extracts with laccase from Trametes 63ersicolour and β-amylase from Ipomoea batatas. Tea plants used in this study wereSaturejamontana, Menthapiperita, Salvia officinalis, Matricariachamomilla, Camellia cinensis and Arctostaphylosuva-ursi. Total phenolic content was determined using Folin-Ciocalteu reagent, which showed us that chosen plants vary considerably in their total phenolic content and the highest concentration was found to be in Arctostaphylosuva-ursi. Protein interactions between tea plant extracts were measured using spectrophotometric, spectrofluorimetric and electrophoretic methods. These methods showed that tea plant extracts lead to various structural changes within the protein, nature of which require 
further research. Finally, it was also found that all tea plant extracts, except Matricariachamomillaextract, reversibly precipitate β-amylase – whilst retaining most of 
its enzymatic activity after dissolving.Best results were obtained using Arctostaphylosuva-ursi extract, which precipitated the highest quantity of β-amylase, with highest activity retention. Although being an interesting phenomenon, furtherresearch is necessary to determine the nature andimportance of reversible tannic enzyme precipitation.",
publisher = "Serbian Chemical Society",
journal = "Book of Abstracts, Proceedings - 58th Meeting of the Serbian Chemical Society, Belgrade, Serbia, June 9-10, 2022 / Kratki izvodi radova, kjniga radova - 58. Savetovanje Srpskog hemijskog društva, Beograd 9. i 10. jun 2022. godine",
title = "Protein interactions of six tea plant extracts",
pages = "63",
url = "https://hdl.handle.net/21.15107/rcub_cer_5841"
}

Mišić, M., Drulović, N., Margetić, A., Vujčić, Z.,& Vujčić, M.. (2022). Protein interactions of six tea plant extracts. in Book of Abstracts, Proceedings - 58th Meeting of the Serbian Chemical Society, Belgrade, Serbia, June 9-10, 2022 / Kratki izvodi radova, kjniga radova - 58. Savetovanje Srpskog hemijskog društva, Beograd 9. i 10. jun 2022. godine
Serbian Chemical Society., 63.
https://hdl.handle.net/21.15107/rcub_cer_5841

Mišić M, Drulović N, Margetić A, Vujčić Z, Vujčić M. Protein interactions of six tea plant extracts. in Book of Abstracts, Proceedings - 58th Meeting of the Serbian Chemical Society, Belgrade, Serbia, June 9-10, 2022 / Kratki izvodi radova, kjniga radova - 58. Savetovanje Srpskog hemijskog društva, Beograd 9. i 10. jun 2022. godine. 2022;:63.
https://hdl.handle.net/21.15107/rcub_cer_5841 .

Mišić, Milan, Drulović, Nenad, Margetić, Aleksandra, Vujčić, Zoran, Vujčić, Miroslava, "Protein interactions of six tea plant extracts" in Book of Abstracts, Proceedings - 58th Meeting of the Serbian Chemical Society, Belgrade, Serbia, June 9-10, 2022 / Kratki izvodi radova, kjniga radova - 58. Savetovanje Srpskog hemijskog društva, Beograd 9. i 10. jun 2022. godine (2022):63,
https://hdl.handle.net/21.15107/rcub_cer_5841 .

TY  - JOUR
AU  - Stojanović, Sanja
AU  - Stepanović, Jelena
AU  - Špirović Trifunović, Bojana
AU  - Duduk, Nataša
AU  - Dojnov, Biljana
AU  - Duduk, Bojan
AU  - Vujčić, Zoran
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5585
AB  - Research background. Inulinases are used for fructooligosaccharide production and they are of interest for both scientific community and industry. Black aspergilli represent a diverse group of species that has use for enzyme production, in particular some species are known as potent inulinase producers. Finding new potential producers from the environment is as important as improving the production with known strains. Safe use of enzymes produced by aspergilli in food industry is placed ahead of their benefit for inulinase production.  Experimental approach. Here we show a specific approach to finding/screening of newly isolated fungal inulinase producers that combines a newly developed screening method and an equally important assessment of the toxigenic potential of the fungus. In this study 39 black aspergilli collected from different substrates in Serbia were identified and assessed for inulinase production.  Results and conclusions. The most common species were Aspergillus tubingensis (51.2 %), followed by A. niger (23.1 %), A. welwitschiae (23.1 %) and A. uvarum (2.6 %). The isolates for inulinase production were selected using a cheap and easy, fast and non-hazardous alternative inulinase screening test developed in this work. Enzymatic activity of selected inulinase-producing strains was confirmed spectrophotometrically. Since some A. niger and A. welwitschiae strains are able to produce mycotoxins ochratoxin A (OTA) and fumonisins (FB), the toxigenic potential of selected inulinase producers was assessed analytically and genetically. Fungal enzyme producer can be considered safe for use in food industry only after comparing the results of both approaches for investigating toxic potential, the direct presence of mycotoxins in the enzyme preparation (analytically) and the presence of mycotoxin gene clusters (genetically). In some strains the absence of OTA and FB production capability was molecularly confirmed by the absence of complete or critical parts of biosynthetic gene clusters, respectively. The two best inulinase producers and mycotoxin non-producers (without mycotoxin production capability as additional safety) were selected as potential candidates for further development of enzyme production.  Novelty and scientific contribution. The presented innovative approach for the selection of potential fungal enzyme producer shows that only non-toxigenic fungi could be considered as useful in food industry. Although this study was done on local isolates, the approach is applicable globally.
PB  - Faculty of Food Technology and Biotechnology - University of Zagreb
T2  - Food Technology and Biotechnology
T1  - Selection of Non-Mycotoxigenic Inulinase Producers in the Group of Black Aspergilli for Use in Food Processing
VL  - 60
IS  - 4
SP  - 421
EP  - 433
DO  - 10.17113/ftb.60.04.22.7521
ER  - 

@article{
author = "Stojanović, Sanja and Stepanović, Jelena and Špirović Trifunović, Bojana and Duduk, Nataša and Dojnov, Biljana and Duduk, Bojan and Vujčić, Zoran",
year = "2022",
abstract = "Research background. Inulinases are used for fructooligosaccharide production and they are of interest for both scientific community and industry. Black aspergilli represent a diverse group of species that has use for enzyme production, in particular some species are known as potent inulinase producers. Finding new potential producers from the environment is as important as improving the production with known strains. Safe use of enzymes produced by aspergilli in food industry is placed ahead of their benefit for inulinase production.  Experimental approach. Here we show a specific approach to finding/screening of newly isolated fungal inulinase producers that combines a newly developed screening method and an equally important assessment of the toxigenic potential of the fungus. In this study 39 black aspergilli collected from different substrates in Serbia were identified and assessed for inulinase production.  Results and conclusions. The most common species were Aspergillus tubingensis (51.2 %), followed by A. niger (23.1 %), A. welwitschiae (23.1 %) and A. uvarum (2.6 %). The isolates for inulinase production were selected using a cheap and easy, fast and non-hazardous alternative inulinase screening test developed in this work. Enzymatic activity of selected inulinase-producing strains was confirmed spectrophotometrically. Since some A. niger and A. welwitschiae strains are able to produce mycotoxins ochratoxin A (OTA) and fumonisins (FB), the toxigenic potential of selected inulinase producers was assessed analytically and genetically. Fungal enzyme producer can be considered safe for use in food industry only after comparing the results of both approaches for investigating toxic potential, the direct presence of mycotoxins in the enzyme preparation (analytically) and the presence of mycotoxin gene clusters (genetically). In some strains the absence of OTA and FB production capability was molecularly confirmed by the absence of complete or critical parts of biosynthetic gene clusters, respectively. The two best inulinase producers and mycotoxin non-producers (without mycotoxin production capability as additional safety) were selected as potential candidates for further development of enzyme production.  Novelty and scientific contribution. The presented innovative approach for the selection of potential fungal enzyme producer shows that only non-toxigenic fungi could be considered as useful in food industry. Although this study was done on local isolates, the approach is applicable globally.",
publisher = "Faculty of Food Technology and Biotechnology - University of Zagreb",
journal = "Food Technology and Biotechnology",
title = "Selection of Non-Mycotoxigenic Inulinase Producers in the Group of Black Aspergilli for Use in Food Processing",
volume = "60",
number = "4",
pages = "421-433",
doi = "10.17113/ftb.60.04.22.7521"
}

Stojanović, S., Stepanović, J., Špirović Trifunović, B., Duduk, N., Dojnov, B., Duduk, B.,& Vujčić, Z.. (2022). Selection of Non-Mycotoxigenic Inulinase Producers in the Group of Black Aspergilli for Use in Food Processing. in Food Technology and Biotechnology
Faculty of Food Technology and Biotechnology - University of Zagreb., 60(4), 421-433.
https://doi.org/10.17113/ftb.60.04.22.7521

Stojanović S, Stepanović J, Špirović Trifunović B, Duduk N, Dojnov B, Duduk B, Vujčić Z. Selection of Non-Mycotoxigenic Inulinase Producers in the Group of Black Aspergilli for Use in Food Processing. in Food Technology and Biotechnology. 2022;60(4):421-433.
doi:10.17113/ftb.60.04.22.7521 .

Stojanović, Sanja, Stepanović, Jelena, Špirović Trifunović, Bojana, Duduk, Nataša, Dojnov, Biljana, Duduk, Bojan, Vujčić, Zoran, "Selection of Non-Mycotoxigenic Inulinase Producers in the Group of Black Aspergilli for Use in Food Processing" in Food Technology and Biotechnology, 60, no. 4 (2022):421-433,
https://doi.org/10.17113/ftb.60.04.22.7521 . .

TY  - CONF
AU  - Dojnov, Biljana
AU  - Stojanović, Sanja
AU  - Ristović, Marina
AU  - Vujčić, Zoran
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5888
AB  - Енергетска транзиција подразумева примену правилног управљања отпадним биомасама које обухвата њено смањење, поновну употребу, рециклирање, добијање енергије и/или одлагање. Наука нуди решења за ефикасну примену поновне употребе и рециклирања, где се добијају производи додатне вредности. У Србији, према проценама, у врстама отпадних биомаса доминирају жетвени остаци (10.140.268 t годишње) и остаци резидбе воћа (74.329 t годишње) а следе стајњак, отпадни материјал из прерадне индустрије и биоразградиви комунални отпад. Биопроцесовање (употреба микроба и ензима) представља најприхватљивије решење заштите животне средине, где се из отпадне биомасе добијају вредни производи (пребиотици, биоактивни пептиди, антибиотици, терпеноиди, алкалоиди, итд.) широке примене у храни, лековима и козметици.
Из отпадног клипа кукуруза (кога у Србији има 1.073.780 t годишње) добијају се пребиотици, одобрени за употребу у исхрани. Искоришћени компост за гајење шампињона је погодан супстрат за микробиолошко добијање индустријски значајних ензима (амилазе, целулазе, ксиланазе). Постоје примери индустрије где се из дрвних остатака (којих има у Србији 700.000 m3 годишње) поред етанола добијају и ацеталдехид, сирћетна киселина и етилацетат. Екстракцијом из остатака индустрије прераде воћа, поврћа и винове лозе се могу добити полифеноли (антиоксиданси) и други вредни производи. Максимална искористљивост отпадне биомасе може се постићи комбиновањем метода биопроцесовања за добијање производа додатне вредности са добијањем енергије (биогаса, биоетанола).
PB  - Српска академија наука и уметности - академијски одбор за енергетику
C3  - Свеска сажетака - Научни скуп - потенцијал и ефекти коришћења биомасе у Републици Србији, 2. и 3. Новембар 2022, Београд
T1  - Добијање производа додатне вредности од отпадне биомасе
SP  - I-7
UR  - https://hdl.handle.net/21.15107/rcub_cer_5888
ER  - 

@conference{
author = "Dojnov, Biljana and Stojanović, Sanja and Ristović, Marina and Vujčić, Zoran",
year = "2022",
abstract = "Енергетска транзиција подразумева примену правилног управљања отпадним биомасама које обухвата њено смањење, поновну употребу, рециклирање, добијање енергије и/или одлагање. Наука нуди решења за ефикасну примену поновне употребе и рециклирања, где се добијају производи додатне вредности. У Србији, према проценама, у врстама отпадних биомаса доминирају жетвени остаци (10.140.268 t годишње) и остаци резидбе воћа (74.329 t годишње) а следе стајњак, отпадни материјал из прерадне индустрије и биоразградиви комунални отпад. Биопроцесовање (употреба микроба и ензима) представља најприхватљивије решење заштите животне средине, где се из отпадне биомасе добијају вредни производи (пребиотици, биоактивни пептиди, антибиотици, терпеноиди, алкалоиди, итд.) широке примене у храни, лековима и козметици.
Из отпадног клипа кукуруза (кога у Србији има 1.073.780 t годишње) добијају се пребиотици, одобрени за употребу у исхрани. Искоришћени компост за гајење шампињона је погодан супстрат за микробиолошко добијање индустријски значајних ензима (амилазе, целулазе, ксиланазе). Постоје примери индустрије где се из дрвних остатака (којих има у Србији 700.000 m3 годишње) поред етанола добијају и ацеталдехид, сирћетна киселина и етилацетат. Екстракцијом из остатака индустрије прераде воћа, поврћа и винове лозе се могу добити полифеноли (антиоксиданси) и други вредни производи. Максимална искористљивост отпадне биомасе може се постићи комбиновањем метода биопроцесовања за добијање производа додатне вредности са добијањем енергије (биогаса, биоетанола).",
publisher = "Српска академија наука и уметности - академијски одбор за енергетику",
journal = "Свеска сажетака - Научни скуп - потенцијал и ефекти коришћења биомасе у Републици Србији, 2. и 3. Новембар 2022, Београд",
title = "Добијање производа додатне вредности од отпадне биомасе",
pages = "I-7",
url = "https://hdl.handle.net/21.15107/rcub_cer_5888"
}

Dojnov, B., Stojanović, S., Ristović, M.,& Vujčić, Z.. (2022). Добијање производа додатне вредности од отпадне биомасе. in Свеска сажетака - Научни скуп - потенцијал и ефекти коришћења биомасе у Републици Србији, 2. и 3. Новембар 2022, Београд
Српска академија наука и уметности - академијски одбор за енергетику., I-7.
https://hdl.handle.net/21.15107/rcub_cer_5888

Dojnov B, Stojanović S, Ristović M, Vujčić Z. Добијање производа додатне вредности од отпадне биомасе. in Свеска сажетака - Научни скуп - потенцијал и ефекти коришћења биомасе у Републици Србији, 2. и 3. Новембар 2022, Београд. 2022;:I-7.
https://hdl.handle.net/21.15107/rcub_cer_5888 .

Dojnov, Biljana, Stojanović, Sanja, Ristović, Marina, Vujčić, Zoran, "Добијање производа додатне вредности од отпадне биомасе" in Свеска сажетака - Научни скуп - потенцијал и ефекти коришћења биомасе у Републици Србији, 2. и 3. Новембар 2022, Београд (2022):I-7,
https://hdl.handle.net/21.15107/rcub_cer_5888 .